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unclebear 10-01-2013 11:46 AM

Truck Help
 
I figured I'd ask you all about this see if anyone has any idea's,

I have a F250 88 yr runnin a 461 under the hood, and the darn thing doesn't like to idle no matter what we do to it and when it wants to idle and run she wants to die when I go to put her in reverse, regular drive seems to go right most of the time.

Taking it to a mechanic isn't an option, to broke and don't trust them.

So any ideas?

hairbear1 10-01-2013 11:53 AM

Quote:

Originally Posted by unclebear (Post 1389318)
I figured I'd ask you all about this see if anyone has any idea's,

I have a F250 88 yr runnin a 461 under the hood, and the darn thing doesn't like to idle no matter what we do to it and when it wants to idle and run she wants to die when I go to put her in reverse, regular drive seems to go right most of the time.

Taking it to a mechanic isn't an option, to broke and don't trust them.

So any ideas?

I'm assuming carburation so going on that have you taken the carby off and pulled it apart and blown the jets and idle circuits out with compressed air?

Have you checked the needle and seat for sticking or correct height adjustment of the float level and have you adjusted the air fuel mixture and idle speed especially crucial if it's an auto as most are adjusted by putting the auto into drive and adjusting the idle speed on the carby so that it's about 650 rpm in drive?

Have you replaced or checked any fuel filters for blockages

rn-cindy 10-01-2013 12:08 PM

If it drives ok, just wont idle...i would suspect a vacuum leak, or throttle position sensor. If it wont idle, or run, clogged cat converter, or fuel filter.

rockratt 10-01-2013 12:37 PM

De-ja-poo. I think I posted on this in here once before but here goes again. I am ass-u-me-ing it is EFI. If that is the case then I would start with what Ford calls the idle control valve. They were the usual culprit when having idle problems on the early and some of the later Ford EFI's.

unclebear 10-01-2013 12:47 PM

It's an automatic tranny and fuel injected, the problem is she doesn't want to run to well I have to keep reving her when I stop at stop signs and that's when she does want to run. I'll have to check this EFI, when she does run she drives real smooth got to 80 with out realizing it one day. On top of this I also have a a bad seal on the exhaust manifold and it's baking my spark plus wire on the left side of the block.

hairbear1 10-01-2013 12:57 PM

Quote:

Originally Posted by unclebear (Post 1389343)
It's an automatic tranny and fuel injected, the problem is she doesn't want to run to well I have to keep reving her when I stop at stop signs and that's when she does want to run. I'll have to check this EFI, when she does run she drives real smooth got to 80 with out realizing it one day. On top of this I also have a a bad seal on the exhaust manifold and it's baking my spark plus wire on the left side of the block.

That exhaust leak could be most of your problems.I'd also see about getting your plug wires checked that are getting baked.

A vacuum leak could also be a problem so check your vacuum hoses for cracks.

unclebear 10-01-2013 01:17 PM

I've got some new gaskets for the exhaust also some high temp wire insulation sitting in my tool box, I'm also waiting for payday so I can get anything else I might need. I figured it was just something to do with not enough fuel getting to the engine because I have to keep revving it and it doesn't want to idle. But I'll be able to check this when I get home right now I'm still at work on a break.

Thanks for the help guys I appreciate it I'll let you know what I find out.

willshoum 10-01-2013 02:55 PM

Are you kidding..............
 
Did you check the fuel cap, my wifes car went berserk because the cap wasn't seated right, and caused problems with the fuel pump...............:confused:

FrontierTCB 10-01-2013 03:04 PM

Quote:

Originally Posted by rockratt
De-ja-poo. I think I posted on this in here once before but here goes again. I am ass-u-me-ing it is EFI. If that is the case then I would start with what Ford calls the idle control valve. They were the usual culprit when having idle problems on the early and some of the later Ford EFI's.

I second this. I had the same issue was able to clean the gummed up valve and its been running great for over a year now. Google "Cleaning Ford IAC valve".

It's on the side of the throttle body. Takes about 15 min. to clean.

Just for info mine is a '95 EFI

RJMercer 10-02-2013 08:47 AM

I had similar trouble with my 86 only it was with a 302 but it still had the same EEC4 computer and EFI system. +1 on hosing the IAC with carb cleaner or just replace it all together. It's a super cheap part.
+1 on checking vacuum lines and fittings and plugs.
Add a can of B-12 chemtool or drip gas if you can find it in a full tank of high octane gas to jet out the injectors.
Check your tranny fluid and make sure it doesn't smell burnt or if you can't remember the last time it was changed it's probably time for new fluid and filter.


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