Need help with 302
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New User
Joined: May 2008
Posts: 15
Likes: 0
Need help with 302
i recently just got a 1985 f150, it has a fuel injected 302. However it is not running right, it will start up and idle kind of fine (around 1100rpm) but is not very responsive at all off idle and will intermittently backfire and misfire through the intake.. i have talked to several mechanics and they all told me it was due to bad fuel as the truck was sitting for about 5 years.. but we drained the fuel added new gas and it does the exact same thing... me and my dad can not figure it out.. so any help would be great..
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
1100rpm is way too high so right away you have either a stuck throttle or IAC valve, or a large vacuum leak. I suggest you remove and clean the IAC and throttle and ensure the throttle cable moves smoothly.
The next thing to do is pull the codes, Ford Fuel Injection to see how.
The next thing to do is pull the codes, Ford Fuel Injection to see how.
