help 94 mustang 3.8 bad miss spitting fuel out tail pipe
#1
10-07-07, 06:11 PM
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help 94 mustang 3.8 bad miss spitting fuel out tail pipe
hi i put my 94 rag top mustang up for sale and i let a lady take it for a test ride (without me)this car ran great before she left i drove it every day wen she brout it back it was running bad no power and spitting fuel out the tail pipe she sed she took it to a friend to look at but he did nothing to it just looked under the hood so anyway i changed the plugs and wires checked the firing order just to make shure but now im not shure what else to do any help would be great and yes the check engin light is on now i know i could take it to auto zone for a scan but it runs to bad to drive it please help
#2
10-07-07, 07:11 PM
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I don't think your car is OBDII compliant so I don't think Autozone will be able to scan your codes.
These 3.8's of your year were notorious for head gasket failures and there was a recall on them.
I had a 94 Stang 3.8 back when they came out and that is what happened with mine. It did the same thing you are describing. It may not be what is wrong, but it's worth looking into.
How has the temp reading been lately?
These 3.8's of your year were notorious for head gasket failures and there was a recall on them.
I had a 94 Stang 3.8 back when they came out and that is what happened with mine. It did the same thing you are describing. It may not be what is wrong, but it's worth looking into.
How has the temp reading been lately?
#3
10-08-07, 05:22 PM
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the temp reading is fine
theres no water in oil or oil in water the temp stays were it should and i tried to buy a scanner at auto zone today and they don't have one for the 94 so I'm just not sure what to do next i don't want to take it to the shop
Last edited by slickshift; 10-08-07 at 05:35 PM. Reason: edited for content
#4
10-08-07, 05:40 PM
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You can DIY the codes on this EEC-IV controlled pre-OBII engine
http://www.troublecodes.net/Ford/
or
http://fordfuelinjection.com/?p=13
And ed, please be considerate of the professional mechanics, shop owners, and other service people that volunteer to delve into these forums to help people DIY car work free of charge by being careful in how you refer to them
Thank You
http://www.troublecodes.net/Ford/
or
http://fordfuelinjection.com/?p=13
And ed, please be considerate of the professional mechanics, shop owners, and other service people that volunteer to delve into these forums to help people DIY car work free of charge by being careful in how you refer to them
Thank You
#5
10-08-07, 06:09 PM
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sorry and i do thank everyone for any help thay can offer
i didn't mean anything bad about mechanics i was talking about the hourly price at a dealership and i know its a set price and its not the mechanics that set it thats all
also i bout the book for the 94 mustang and you can only check the codes like that on the 5.0 not the 3.8 unless theres another way and i don't know it but i do like them links and I'm sure sometime i will need them on another car down the road
also i bout the book for the 94 mustang and you can only check the codes like that on the 5.0 not the 3.8 unless theres another way and i don't know it but i do like them links and I'm sure sometime i will need them on another car down the road
#6
10-08-07, 06:51 PM
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Originally Posted by ed_r_mustang
... you can only check the codes like that on the 5.0 not the 3.8...
I thought it'd work for all pre-OBD-II
Don't know a separate procedure for 3.8s
#7
10-08-07, 07:27 PM
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The procedure slick posted should work.
Doesn't matter what engine, just ground out the A&B terminal of the test plug and count the flashes.
Doesn't matter what engine, just ground out the A&B terminal of the test plug and count the flashes.
#8
10-09-07, 05:24 AM
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weres the test plug on my 3.8
Originally Posted by HotinOKC
The procedure slick posted should work.
Doesn't matter what engine, just ground out the A&B terminal of the test plug and count the flashes.
Doesn't matter what engine, just ground out the A&B terminal of the test plug and count the flashes.
#9
10-10-07, 04:14 PM
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code p0302-p0306
OK i scanned the car with a OBDII and it showing number 2 and 6 cylinders misfire this car has new plugs and wires it seems to have good spark going to the plugs can anyone help me from here the coil pack seems to have good spark 
#10
10-10-07, 04:45 PM
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Have a compression test done on the cylinders to help rule out a blown head gasket.
Here is a ignition coil test procedure that should be done as well.
http://www.autozone.com/az/cds/en_us...rInfoPages.htm
Here is a ignition coil test procedure that should be done as well.
http://www.autozone.com/az/cds/en_us...rInfoPages.htm
#11
10-12-07, 12:59 PM
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compression in all cylinders 150-160
OK i did the compression test today 150-160 in all cylinders i guess thats good does anyone have any suggestions on were to go know and again i would like to thank everyone for the help theres a lot of good people on here thanks everyone
#12
10-12-07, 01:20 PM
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Double check your wire routing on the plug wires
Make sure none are too close to any others
Two wire too close together could cause this misfire*
Use a loom (separator) if need be
Make sure they are all tight (plugs in head, wires to plugs)
I don't remember if this engine has cap/rotor
If it does, check for loose, cracked, or wrong install
I'm sure her friend messed with something
Probably something simple...something easy to mess up...just hard to figure out what
*As could after market wires (with this vintage Ford)...what kind of wires/plugs are in there now?
Make sure none are too close to any others
Two wire too close together could cause this misfire*
Use a loom (separator) if need be
Make sure they are all tight (plugs in head, wires to plugs)
I don't remember if this engine has cap/rotor
If it does, check for loose, cracked, or wrong install
I'm sure her friend messed with something
Probably something simple...something easy to mess up...just hard to figure out what
*As could after market wires (with this vintage Ford)...what kind of wires/plugs are in there now?
#13
10-12-07, 05:09 PM
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could this just be my coil
the wires are fine and neatly fastened and the plugs are fine to my coil goes 123-465 and because 2 and 6 are across from each other do they fire together if so the coil pack is probable my problem then what do you think hotinOKC sent a link on how to test it but it don't show a coil pack
#14
10-12-07, 05:57 PM
try the link below but usually you can tell the coil is bad by checking for spark at the coil by using a test light hooked to ground and removing one wire and having someone start the engine while holding the test light about 1/2 inch from the coil tower comparing the spark to other cylinders a bad coil may not have any spark or a noticably weak one that usually will not jump a 1/2 inch gap.
http://www.autozone.com/az/cds/en_us...rInfoPages.htm
http://www.autozone.com/az/cds/en_us...rInfoPages.htm
#15
10-13-07, 11:51 AM
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the coil is fine
well today i checked the coil but no luck there it tests good what do you think know maby the crank sensor 
#16
10-13-07, 02:46 PM
I'd pull the plug wires off each plug and reseat them; the girl's mechanic might have pulled wires off and not gotten them on correctly leading to a misfire.
Good luck.
Good luck.
#17
10-13-07, 05:52 PM
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its not the plugs or wires
Originally Posted by bob22
I'd pull the plug wires off each plug and reseat them; the girl's mechanic might have pulled wires off and not gotten them on correctly leading to a misfire.
Good luck.
Good luck.
#18
10-13-07, 06:16 PM
how did you test for spark if your just sticking a spark plug in the wire and seeing if it sparks it isnt a good enough test even a weak coil can fire a plug out of the cylinder it takes alot more voltage to fire the plug under compression wich is why spark testers often have adjustable gaps or an extremly large gap.
what else have you checked have you might check for vacum leaks do the injectors appear to be working on those cylinders?
what else have you checked have you might check for vacum leaks do the injectors appear to be working on those cylinders?
#19
10-13-07, 06:19 PM
it may be dumping to much fuel into those two cylinders might pull the vacum line off the fuel regulator to see if its leaking and flooding those 2 cylinders what cylinders the fuel goes into is often only reletive to the vacum line position on the intake when a regulator goes bad.
#20
10-13-07, 06:33 PM
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new fuel regulator
Originally Posted by bejay
it may be dumping to much fuel into those two cylinders might pull the vacum line off the fuel regulator to see if its leaking and flooding those 2 cylinders what cylinders the fuel goes into is often only reletive to the vacum line position on the intake when a regulator goes bad.
#21
10-13-07, 06:43 PM
would be doing a spark test on the coil pack if you dont have a spark tester make one with an old plug just cut off the ground electrode so it has to jump a larger gap to go to ground you can also use a test light or scredwiver and jumper wire to ground for checking directly at the coil.
#22
10-14-07, 06:28 AM
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today im taking the coil to auto zone
Originally Posted by bejay
would be doing a spark test on the coil pack if you dont have a spark tester make one with an old plug just cut off the ground electrode so it has to jump a larger gap to go to ground you can also use a test light or scredwiver and jumper wire to ground for checking directly at the coil.
#23
10-14-07, 11:01 AM
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bought a new coil pack
well today i bought a new coil pack and still no luck thats not the problem
#24
10-14-07, 03:45 PM
double check your firing order one more time use the link below to help you if its ok would suggest you just have a shop diagnose it.
http://www.moddedmustangs.com/ford-f....html#more-218
http://www.moddedmustangs.com/ford-f....html#more-218
#25
10-14-07, 05:27 PM
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New plugs, wires, and coil pack, right? Compression all appears to be good. I'm starting to wonder if the #2 and #6 injectors are stuck open or shorted.
#26
10-14-07, 05:46 PM
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Originally Posted by warhammerdriver
New plugs, wires, and coil pack, right? Compression all appears to be good. I'm starting to wonder if the #2 and #6 injectors are stuck open or shorted.
#28
10-14-07, 08:13 PM
is your coil numbered like this?
123
465
or like this?
123
564
the bottom one should be correct.
still think its something simple, and ive never seen a cam or crank sensor cause a misfire on two cylinders however the ignition module or pcm could possibly cause 2 cylinders not to fire but a simple spark test would tell you if the coil is working, if it was module or pcm related you would not have spark on those 2 cylinders if you have spark would see a shop for diagnossis as youve already spent way to much trying to fix this problem and the car could of already been repaired had you took it to a shop to begin with.
123
465
or like this?
123
564
the bottom one should be correct.
still think its something simple, and ive never seen a cam or crank sensor cause a misfire on two cylinders however the ignition module or pcm could possibly cause 2 cylinders not to fire but a simple spark test would tell you if the coil is working, if it was module or pcm related you would not have spark on those 2 cylinders if you have spark would see a shop for diagnossis as youve already spent way to much trying to fix this problem and the car could of already been repaired had you took it to a shop to begin with.
#29
10-15-07, 05:55 AM
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Originally Posted by bejay
is your coil numbered like this?
123
465
or like this?
123
564
the bottom one should be correct.
still think its something simple, and ive never seen a cam or crank sensor cause a misfire on two cylinders however the ignition module or pcm could possibly cause 2 cylinders not to fire but a simple spark test would tell you if the coil is working, if it was module or pcm related you would not have spark on those 2 cylinders if you have spark would see a shop for diagnossis as youve already spent way to much trying to fix this problem and the car could of already been repaired had you took it to a shop to begin with.
123
465
or like this?
123
564
the bottom one should be correct.
still think its something simple, and ive never seen a cam or crank sensor cause a misfire on two cylinders however the ignition module or pcm could possibly cause 2 cylinders not to fire but a simple spark test would tell you if the coil is working, if it was module or pcm related you would not have spark on those 2 cylinders if you have spark would see a shop for diagnossis as youve already spent way to much trying to fix this problem and the car could of already been repaired had you took it to a shop to begin with.
#30
10-15-07, 12:34 PM
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a local mechanic thinks i should try the ignition module what do you think could this do this to my car
#31
10-16-07, 03:01 AM
if the car has good spark when running to both those cylinders then I dont see a module causing the problem and for what the module cost you could probably pay a shop to diagnose the problem for you, even if you do the repairs knowing whats wrong exactly will allow you to not waste any more on parts that the car does not need.
#32
10-16-07, 06:16 AM
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well i guess its time to go to the shop
i would like to thank every one for all there help your a great bunch and i guess as soon as i got the time I'm going to have the car towed to the shop i will let you know what the problem was as soon as i fined out and again thank you all
#33
10-20-07, 03:56 PM
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i was going to have the car towed to the shop today but thought i would give it one more try i got a computer out of a 95 windstar with the same 3.8 motor for free so i thought i would try it and theres no more fuel out the exhaust and no more misfire codes but i now have to more codes p0443 purge valve c fault and p0760 shift solenoid c malfunction and i cant fined a shift solenoid in my book so is this because i used the windstar computer
#34
11-06-07, 06:48 PM
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Originally Posted by ed_r_mustang
i was going to have the car towed to the shop today but thought i would give it one more try i got a computer out of a 95 windstar with the same 3.8 motor for free so i thought i would try it and theres no more fuel out the exhaust and no more misfire codes but i now have to more codes p0443 purge valve c fault and p0760 shift solenoid c malfunction and i cant fined a shift solenoid in my book so is this because i used the windstar computer
It's possible the original PCM just needs to be reprogrammed, but I doubt it.
#35
11-09-07, 08:43 AM
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the problem is solved
it was the computer i got a used one from ebay $45.00 now the car runs great i just need to change the oil again and off i go i would like to thank ever one for all the help and suggestions your a good group thanks again and ill keep checking to see if maby i can help some one on here in the future 
#36
11-09-07, 05:15 PM
So you first had YOUR computer. The you put in the 95 computer and it fixed certain things - but brought 2 different codes? And then you went and got yet another computer? Explain the 95 one more, if you are still around, just for curiousity sake.
#37
11-28-07, 09:21 PM
hey man i had same prob exactly
ok i was stumped too but i had raw fuel comming out the drivers side tailpipe so depending on the side check all plugs on that side and the wet one is a stuck wide open injector
swear on it dude .
also if youve been messing (OR TEST DRIVER WAS ) with it my idle prob came when i was checking to see what the raw Fuel prob was and knocked the vacum line at the back underside of the plenum
off could hardly hear the leak but was really faint pluged it back on and idle fluxuation (missing like ****) was gonzo
hope this helps also if you have a buddy wirh 94-95-96 borrow there pcm (computer) i had mine crap out the first week i had mine and ran real ****ty missing and power loss .
good luck johnrockjon
p.s hit me back when you get it fixed
( nothing better for no how than a good head scratchin) lol
swear on it dude .
also if youve been messing (OR TEST DRIVER WAS ) with it my idle prob came when i was checking to see what the raw Fuel prob was and knocked the vacum line at the back underside of the plenum
off could hardly hear the leak but was really faint pluged it back on and idle fluxuation (missing like ****) was gonzo
hope this helps also if you have a buddy wirh 94-95-96 borrow there pcm (computer) i had mine crap out the first week i had mine and ran real ****ty missing and power loss .
good luck johnrockjon
p.s hit me back when you get it fixed
( nothing better for no how than a good head scratchin) lol
Last edited by 94 v6; 11-28-07 at 09:23 PM. Reason: spelling
