I still haven't figured out what is going on with my 95 f-150 302 auto, I've changed every sensor, EGR valve, ignition coil and it's still running like crap. I haven't had a whole lot of time to work on it since I'm on the road alot. What it's doing is it's bogging down under light acceleration and backfiring on the bottom end of the motor and not out the exhaust. It acts like it wants to cut out, but once I push the gas pedal down it will start to go again. I do smell gas like it's running rich or something and I heard some squealing, but could not figure out where it was coming from, because it did not sound like a belt. Has anyone else had this problem, I'm racking my brains out over this. Just out of curiosity, can a smog pump go bad and be causing this. Also, I tested the cats and they were still good, any help would be greatly appreciated. Thank you
1990 F150 4x4 XLT X-Cab 5.0, 3.55LS, Comp XE264HR-14, Flowtech LT's to 3" single, FRPP Mass Air Conversion, TweecerRT with BE, Innovate LC-1 wideband O2
Sounds a lot like when my smog pump started to go! Try to spin the smog pulley by hand.
Your pump is most likely beginning to seize.
And as always, tune it up and pull codes please!
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1993 Ford F150 XLT 4x4 5.0 5spd with a Fresh Rebuild
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Yes , pulled codes and the only one to come up is EGR has insufficient flow, so I changed the EGR valve out. The plug wires are relatively new and I replaced them one at a time when it was running good. Something else I forgot to mention, my battery light on the dash is flickering and the needle is dancing to the high side. The battery is about 2 months old and I took the alternator off and had it checked a few months ago when all this started and it checked out good. If I'm not mistaken the voltage regulator is built in to the alternator right. When I turn on the A/C and headlights it quits and pulls down some of the juice. Is there a chance that might have something to do with it or could to much voltage blow the PCM. If the PCM was blown, it really would'nt run at all would it? thanks
Yes , pulled codes and the only one to come up is EGR has insufficient flow, so I changed the EGR valve out.
EGR has insufficient flow does not apply to your truck. You read the wrong definition of the code.
Quote:
Originally Posted by frankyford
If the PCM was blown, it really would'nt run at all would it? thanks
The engine can run depending on what is wrong with the PCM.
Check to make sure the “A” wire from the alternator has a good connection all the way to the battery (or its voltage source).
Also check both of your radiator supports grounding points (LH & RH) that they have a good ground.
[quote=subford;7679029]EGR has insufficient flow does not apply to your truck. You read the wrong definition of the code.
My brother-in-law puled the codes at the Ford dealership he's a deisel tech at and that's what the computer said. I'm just going by what it said. When I ran it yesterday, the gas smelled raw and I guess it kinda acts like it's flooding out but not completely if that makes any sense. I wonder if my timing has anything to do with it. I haven't checked my timing and I know my neighbor who used to have it probably never did seeing how I did all of his tune-ups for him.
EGR has insufficient flow does not apply to your truck.
My brother-in-law puled the codes at the Ford dealership he's a deisel tech at and that's what the computer said.
The computer read the wrong definition of the code. It read the right code but the wrong truck must have been input in the data base.
The EGR has insufficient flow definition is for the Differential Pressure Feedback Electronic EGR (DPFE) system. And that is not the EGR system on your truck. Your type truck did not get that system until 1996.
You have in 1995 the EGR Valve Position (EVP) System.
It does not have a sensor for EGR flow. It only looks at how far the EGR valve has moved.
Did you get the code number, if so I could post what it means for your truck.
Pull the hose off the nipple of the Fuel Pressure Regulator (FPR) and see if you have any fuel in it. If you do it is bad and needs to be replaced.
If not that then check your fuel pressure as it may be too high.
Where is the FPR located and no I don't have the code, it was a couple of months ago when I had the codes read. But I do really appreciate all the help your giving me.
Hey subford, I pulled the line off the nipple of the FPR, now did you mean if there's fuel in the line or in the FPR itself. I removed the FPR and fuel came out of the bottom, is that normal or does that mean it's bad. I just want to fully understand what you mean, and for me not to sound like an idiot. thanks
Hey subford, I pulled the line off the nipple of the FPR, now did you mean if there's fuel in the line or in the FPR itself. I removed the FPR and fuel came out of the bottom, is that normal or does that mean it's bad. I just want to fully understand what you mean, and for me not to sound like an idiot. thanks
If you found any fuel at all where you pulled the red vacuum line off the top it is bad and that is your problem.
You need to replace it.
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When I ran it yesterday, the gas smelled raw and I guess it kinda acts like it's flooding out but not completely if that makes any sense. I wonder if my timing has anything to do with it. I haven't checked my timing and I know my neighbor who used to have it probably never did seeing how I did all of his tune-ups for him.
