Won't idle in drive
Thread Starter
Junior Member
Joined: Mar 2017
Posts: 9
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Won't idle in drive
I'm working on a 1995 F150, 4.9 liter, fuel injected, automatic transmission, 2 wheel drive. I cannot get it to idle in drive after the engine reaches operating temperature. Any ideas?
Larry
Larry
Senior Member
Joined: Nov 2016
Posts: 269
Likes: 31
From: Hudson, NC
Sounds like it could be an iac (idle air control) or maf (mass air flow) sensor issue. Either dirty or failed and not supplying enough air....ie: you're running too rich on fuel. Do you get a heavy gas smell when it stalls or shortly after?
Here's a couple of videos that may help.
You should also check your PCV, hose and vacuum lines for holes, cracks or if any have "popped" off.
Could be a throttle position sensor (tps) but more likely an air flow or vacuum issue.
https://m.youtube.com/watch?v=XHhjs9WhWCc
https://m.youtube.com/watch?v=wrpMsBER6Yw
Here's a couple of videos that may help.
You should also check your PCV, hose and vacuum lines for holes, cracks or if any have "popped" off.
Could be a throttle position sensor (tps) but more likely an air flow or vacuum issue.
https://m.youtube.com/watch?v=XHhjs9WhWCc
https://m.youtube.com/watch?v=wrpMsBER6Yw