Okay, truck will start running rough and hesitates after warming up, but only when the temperature outside is really hot. I did a tune up (plugs, wires, cap, rotor) and put on a new fuel filter and a new distributor module, but it will still do this when the temp outside is around 90 or so. What else could I be missing here? Any other time, no issues whatsoever, runs like a dream. I have a 302 FI with auto tranny. It will actually cut off and I'm stuck until I let things cool down for about 30 minutes or so, then I can drive several miles until this same things happens again. Any help on this would be greatly appreciated.

 

What year?

If EFI, pull the codes, here's how:

http://forduelinjection.com/
Ford Ranger/Bronco II EEC-IV Testing

 

That always seems to be the point where people with EFI trucks fail. They want to try to fix their truck BEFORE they pull codes.

The test port is there for a reason. Pull the codes, fix those indicated issues, THEN worry about whatever is left to address.

Works great for my 92. I haven't yet been misled by my truck's computer.

The code reader I bought for my truck is an Equus 3145 Ford Digital Code Reader and it's been spot-on so far. Has a great easy to understand manual that walks you through every test procedure, and a full code list.

 

Well pardon me for being so idiotic, I was unaware on how to even pull the codes until ctubutis posted the link on how to go about it. Anyway, that being said, did it and got the code...which was only one apparently that repeated itself. I just have to check to make sure it was either 33 (which is what I think it was) or 31. Having to re-read the whole pause thing between flashes again. Is there a 1 flash between flashes or is the one flash part of the code flash ?? This can be a little frustrating for us "novices".

 

Dc,

Don't have much to add here other then my camaro had the flashing computer deal. In what was ultimately my ignorance I hated that damn computer. If I ever do it again, I am going to ob2, or no computers at all. Having half decent computers is a pain.

 

DC,

Don't read more into it than was intended, Anafiel is only making generalized statements about a typical male personality trait (kinda like guys in general don't like to read instructions). Nothing personal against you or anything, don't get your panties in a wad over it.

I did this a few weeks ago on my 1986 Tempo DD and the flashes didn't match the printed documentation verbatim but I figured it out.

In my case, it had 2 or 3 codes to spit out at me depending on if the engine was running or not. I also seem to remember a single flash somewhere that confused me, I think I just ignored it (just like you ignore the stuff at the beginning where it thinks it's sending data to a code reader).

Those two sites give slightly different wordings of the code interpretations; combined, they helped me figure out what was wrong.

Example: The first code said the TPS voltage wasn't what it was expecting, the subsequent code said something about the IAC (idle air control, I think those sites call it the ISC - idle speed controller).

Well, it makes sense that the idle speed can't be can't be set if it can't figure out where the throttle position is, and there was nothing wrong with my IAC (a $100 part) it was only the TPS that had failed and that resulted in subsequent detected failures.

Point being, one can't just read the codes and to have it tell you EXACTLY what's wrong, you still have to do some diagnosis on your own.

 

Thanks, CT, that's exactly right. That's why I don't put things together with my wife around. She'll MAKE me read the instructions. I only involve her when I get stumped...


Pulling codes will put you in the right system, and usually right on top of the problem. Threw a code lately (don't remember the exact one) involving my TAD / TAB modules, but I had to stop for a moment and think "what makes these work?". Checked supplied vacuum to the modules, and found a break. No more code.

When I first got the Bronco, it would hardly run. Instead of throwing parts at it, I got the code reader I mentioned in a previous post, and was able to put the truck on the road two days later. Terrible idle, stalling, bucking, and a hard shift that would break your teeth if your were unprepared for it. All identified and fixed because I pulled the codes. One $50.00 part (TPS), and some cleaning of another (IAC) did it. It even cleared up the transmission shift issue. Heck, if the 85 was acting like that, I'd of had to put it in the trans shop, spending G-d only know how much, just to have some simple part replaced.