Efi 302 runs lousy
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New User
Joined: Dec 2007
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From: McKinleyville
Efi 302 runs lousy
well I got my efi conversion.
87 HO out of a mustang gt 5 speed.
Problem:
as the engine warms up it starts to back fire and cut out when I accelerate. Ive replaced the fuel pressure regulator and Ive ran the codes. the only code I get is egr poodle poop which I just took off and cleaned up. it was almost clogged shut. so IDK somebody please help.
Oh I set the base timing at 10 Deg with the spout disconnected and hooked the spout back up and the timing went up to 25 deg advanced. is that Normal???? that seems way too advanced.
87 HO out of a mustang gt 5 speed.
Problem:
as the engine warms up it starts to back fire and cut out when I accelerate. Ive replaced the fuel pressure regulator and Ive ran the codes. the only code I get is egr poodle poop which I just took off and cleaned up. it was almost clogged shut. so IDK somebody please help.
Oh I set the base timing at 10 Deg with the spout disconnected and hooked the spout back up and the timing went up to 25 deg advanced. is that Normal???? that seems way too advanced.
Last edited by IB Tim; Feb 9, 2008 at 07:48 PM.
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New User
Joined: Dec 2007
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From: McKinleyville
I am working on getting a fuel pressure tester, kind of low on money right now. I havent checked the codes again yet. everything is hooked up as I think it should be. and when its cold it stumbles at idle and sometimes dies. but as it warms up it idles fine.
It is an 87 HO computer from a Mustang gt five speed. Speed density, I bought the wiring harness, computer, etc etc. all from the same car.
It is an 87 HO computer from a Mustang gt five speed. Speed density, I bought the wiring harness, computer, etc etc. all from the same car.
Postmaster
Joined: Dec 2002
Posts: 3,594
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From: Southern Oregon USA
Was this a complete engine, or were you adding EFI to your current 302? Like Conanski said, double check your ignition wiring and verify that your distributor is not 180 out (make sure you were on #1 compression when you set the dizzy).
Any off idle vacuum leaks, unused ports not plugged? You have a vacuum line to the MAP sensor?
Buy or borrow a fuel pressure tester. Will really help to isolate your problem.
Jason
Any off idle vacuum leaks, unused ports not plugged? You have a vacuum line to the MAP sensor?
Buy or borrow a fuel pressure tester. Will really help to isolate your problem.
Jason
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Joined: Dec 2007
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From: McKinleyville
yeah Im borrowing a tester tomorrow so Ill check that. im almost positive that Im at #1 tdc. ill have to check that tomorrow. and I have triple checked all of my vacuum lines. and yes map is hooked up. Ill post asap the pressure im at.
Thanks guys.
Thanks guys.
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Joined: Dec 2007
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From: McKinleyville
Originally Posted by RCrawler
What firing order are you using? Was this a complete engine swap or just adding EFI to your existing?
Jason
Jason
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Joined: Jul 2002
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From: Bend,OR
what are the cam specs??? speed density must have a cam with 114* or more lobe seperation. if its below that it wont run properly. Also what size injectors are you using?
I have a mass air overlay harness and mass air meter if you wanna go that route let me know. I can use it on my bronco due to the E4od.
I have a mass air overlay harness and mass air meter if you wanna go that route let me know. I can use it on my bronco due to the E4od.
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From: McKinleyville
Originally Posted by Kemicalburns
what are the cam specs??? speed density must have a cam with 114* or more lobe seperation. if its below that it wont run properly. Also what size injectors are you using?
I have a mass air overlay harness and mass air meter if you wanna go that route let me know. I can use it on my bronco due to the E4od.
I have a mass air overlay harness and mass air meter if you wanna go that route let me know. I can use it on my bronco due to the E4od.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
I'll ask again.. what fuel pump are you using? If this was a carb'd vehicle with an electric pump you need a different pump, because while it may build enough pressure at idle it won't supply the volume necessary to maintain pressure under load. You shoud be getting 32psi at idle and it should jump to 40-45psi when the throttle is opened.