Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

need power


harllo's Avatar
Visiting Guest

Posts: n/a

04-08-04, 02:16 PM   #1  
harllo
need power

Hello I have a 82 Cadilac Coupe Devil, 4100, my problem is this. when i start from the standing position meaning from a light or take off i don't get the power that i should, i start getting enough speed at about 30mph it seems like when i press the gas it wont pick up speed until i press the gas to the floor then it will pick up the same is true when i get on the free way by the time i get to the bottom of the ramp im about 55mph but the peddle is to the floor. ive tuned the car, put accellarator cable on, timed the car. maybe it needs something else any suggestions. thanks.

 
Sponsored Links
Desi501's Avatar
Member

Join Date: Oct 2003
Posts: 2,207

04-08-04, 02:20 PM   #2  
Is the transmission making all the shift it's supposed to?

 
harllo's Avatar
Visiting Guest

Posts: n/a

04-08-04, 02:37 PM   #3  
harllo
yes, and no it seem to shift from1st to 2nd kind of slow but each time i press the accle seems like it do not have spring action its on the floor then i hold it to the floor while i pick up speed and it seem to pick up.

 
Desi501's Avatar
Member

Join Date: Oct 2003
Posts: 2,207

04-08-04, 03:52 PM   #4  
If your not counting three different gears, you may be starting in second gear. Try pulling it down to first gear manually and the shift it manually to be sure. I'm assuming you would recognize a miss in the engine, right?

 
davo's Avatar
Member

Join Date: Apr 2002
Posts: 2,417

04-08-04, 04:27 PM   #5  
If you replaced the fuel filter have an exhaust shop check for too much back pressure in the exhaust the catalytic converter may be getting restricted.

 
harllo's Avatar
Visiting Guest

Posts: n/a

04-11-04, 04:27 PM   #6  
harllo
Originally posted by davo
If you replaced the fuel filter have an exhaust shop check for too much back pressure in the exhaust the catalytic converter may be getting restricted.
the converter is new could it be installed backwards?

 
harllo's Avatar
Visiting Guest

Posts: n/a

04-11-04, 04:30 PM   #7  
harllo
Originally posted by Desi501
If your not counting three different gears, you may be starting in second gear. Try pulling it down to first gear manually and the shift it manually to be sure. I'm assuming you would recognize a miss in the engine, right?
im sure its 3 one at15-18 another at25 and another after 30 or so

 
carguyinva's Avatar
Member

Join Date: Nov 2003
Posts: 1,147
VA

04-12-04, 05:04 AM   #8  
fuel pressure...

....you need to check fuel pressure. but before that...how did you time it? if i remember correctly, you disconnect the timing connector and then check with your light. the timing connector is along the left valve cover and is lime green. if its not a disconnect type, then you ground the lime green connector. so...if it's a connector in the middle of a wire, disconnect and then set timing....but if it's a green connector at the end of a wire, ground it and then set timing.

fuel pressure should be 9 - 13 psi...idling AND driving.

there were many problems with those HT-4100 engines...main bearings, camshaft and distributor gear problems, intake manifold not sealing causing oil consumption and detonation....not to mention that they only made 125 HP when they were new.

good luck...

 
Search this Thread