89 Ford F150 4X4 starting problems


Old 07-23-05, 03:54 PM
Visiting Guest
Posts: n/a
Question 89 Ford F150 4X4 starting problems

My truck has been sitting for a year. I have replaced low pressure pump in tank (and new gasoline). It seems to be pumping fuel, but not reaching the chamber. It is an EFI 300 six cylinder. The engine turns over, but will not start (has new battery). What do you suggest I try next?

Last edited by Larry43; 07-23-05 at 07:46 PM.
Sponsored Links
Old 07-23-05, 09:13 PM
Join Date: Aug 2003
Location: Cape Cod
Posts: 4,320
Received 0 Votes on 0 Posts
Check for spark at the spark plugs

Check for fuel

Was the '89 300 EFI a Central Fuel Injection?
Looks kinda like a carb set up?
There's one or two big injectors inside that you can tell visually if they are squirting

If it was Multi-Port Injection, then you should have a schrader valve on the fuel rail to hook up a fuel pressure gauge
Old 07-24-05, 11:41 AM
Visiting Guest
Posts: n/a
Thanks for the reply. I do not have a schrader valve. The EFI is Central Fuel Injection, but when I open it up I do not see anything squirting. How do I correct this problem?
Old 07-24-05, 12:12 PM
Visiting Guest
Posts: n/a
The 300 six only had multi port injection. Is the high pressure pump on the frame rail running when you crank it? There is a pressure port on the fuel rail towards the back of the engine that you gould check pressure with.Also sitting for a year the injectors could be varnished and stuck shut. To clean the injectors without it running you will need to use a professional type setup that connects to the schrader port with a pressurized can of cleaner and let it sit overnight. Dont forget to pinch off the return hose.
Old 07-24-05, 02:35 PM
Visiting Guest
Posts: n/a
Since I am new to this, where do I find the schrader port that you are referring to? The high pressure pump on the fuel rail is running when I crank the engine. Where do I locate the schrader port?
Old 07-24-05, 03:34 PM
Visiting Guest
Posts: n/a
passenger side of engine at edge of valve cover around the #5 cylinder. Look for the fuel rail running the along this edge with the injectors connected to it.
Old 07-24-05, 06:51 PM
Visiting Guest
Posts: n/a
Thanks, Comptech! I will try your suggestion.
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title: