Yet another 22re misfire/stumble thread

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

B

Banned

10 Year
Joined
Feb 10, 2011
Threads
2
Messages
13
Got an 89 pickup with the 22re. It's always had a random little stumble here and there ever since I got the thing, but it never really bothered me because it was maybe once or twice a week that it would happen. Long story short, all of a sudden it just got really bad. Sometimes, well I guess most of the time at this point, it's so bad that I can't even get the thing up speed without it stumbling and bucking like crazy. It's very violent, and if i hold the gas down while it's doing this for too long, it'll either backfire (if I put the clutch in and free rev it, it sounds like it's hitting rev limiter at about 3500ish rpms and pops, sounds quite a bit like anti lag) I have better luck getting it any higher than about 3500rpms if I bring it up very slowly while free revving, and there's pretty much no way to get passed 3500 while trying to actually drive the thing. Either that will happen, or it'll just die altogether. I'll have to pull over and let it crank over for at least 10 or 15 seconds before it hesitates for a bit and finally starts again. I've literally never smelled any raw fuel, and I'm thinking if it was enough to flood it out I'd probably have smelled it at least once by now. I'm completely stumped, I've already replaced

Plugs
Wires
Cap
Rotor
Coil
Cleaned the **** out of the TB
Fuel filter
Seafoam in the gas tank and crankcase
The motor does have a good ground to the frame
I read somewhere that you can disconnect the vacuum line from the egr valve and plug both sides to bypass the system, not sure if there's any credibility behind that, but I tried it anyways


I'm trying to find somewhere to scan it for any codes, but apparently my truck is archaic at this point because nobody has an obd1 scanner...:o I'm taking it to a shop this saturday to have a few little other things looked at, I'm gonna probably have this fixed too if I can't figure it out by then, anyone have any other suggestions?
 
Check for leaks in air tube/boots. Try to find another AFM you can try out. Save TPS for last. A small crack behind on the back side of the AFM will cause a lot of headaches!
 
Where are you from? Someone may have parts you can use for testing. I have a few good AFM's laying around!
 
I have an issue I need to ask you about. Should I PM you Wristy?
 
WristPin said:
i litererally have been seeing way to many yotas in my shop in the last few month with this.
one was injectors, the other four was bad ECU's
Click to expand...

Alright cool thanks! Getting the injectors cleaned was one of the next things on the list to do, It does seem somewhat more like an electrical issue than a clogged injector, but who knows at this point... :mad:
 
Banned said:
Alright cool thanks! Getting the injectors cleaned was one of the next things on the list to do, It does seem somewhat more like an electrical issue than a clogged injector, but who knows at this point... :mad:
Click to expand...

sometimes it can be the ECU.
that dont mean jump right in and swap it, unless its free.

really do your work, ohm spec the AFM, the TPS and see what happens.

rarely do i see a AFM go bad, TPS ya happens from time to time. ir recall in the last few months here on mud a TPS adjustment/replacment has solved similar issues

doing a injector cleaning, for at least a $100 service (my shop price) involves a solution of the motor-vac brand, which is toxic, effective and very expensive, plus a machine capable of disabling the factory fuel pump, thus supplying adequete pressure and fuel/solution mix to the injectors, and holding pressure in the fuel rail for at least 5 hours, is the most effective fuel service availible.
 
I'll give you a call tomorrow when I'm in the shop. I'm calling it quits for the night though. Thanks!

Have you checked those boots yet? It sounds like you may be getting unmetered air. Spray some carb cleaner, starting fluid, wd40 or similar around your intake boots, tube, vacuum lines, and egr. If you see any difference in revs, you can zero in on some lean problems from there!

Get it idling and pull and replace one plug wire at a time. If you don't notice a difference with a particular wire, you can also isolate some ignition/fuel issues that way.
 
Also just had another idea. You may have a fuel pump on it's way out, bad regulator, or bad return line causing bad fuel delivery. I don't know if there is a good way to check pressure on these motors but wristy might know something.

I'll check on this thread again tomorrow. Good luck and good night!
 
I've done all the work myself besides the clutch so far, including ripping the entire dash out to find some gremlins. (That was fun... :|) I traded my car for it and have had nothing but problems so far, which sucks... However, most of it seems to be issues with preventative maintenance that wasn't performed... That and abuse. It's got a decent sized lift and 35s with a rear locker, so I figured it's probably been hitting some trails pretty hard, but I didn't think the thing would literally fall apart on me the same day I got it... anyways, I haven't checked the boots yet, next day I've got to work on it is sunday... I'm gonna do that and also ohm check the afm and the tps on sunday too. I'll let you guys know what I come up with.
 
raevenzero said:
Also just had another idea. You may have a fuel pump on it's way out, bad regulator, or bad return line causing bad fuel delivery. I don't know if there is a good way to check pressure on these motors but wristy might know something.

I'll check on this thread again tomorrow. Good luck and good night!
Click to expand...

I do know that it sure as hell releases a lot of pressure every time I pull the gas cap off... I'm not sure if that would even have anything to do with it, but I guess the more you know the better... haha
 
Banned said:
I do know that it sure as hell releases a lot of pressure every time I pull the gas cap off... I'm not sure if that would even have anything to do with it, but I guess the more you know the better... haha
Click to expand...
Is it puffing air out, or sucking it in. I had a bad gas cap that caused a strong vacuum to form in the tank. When the vacuum got strong enough it caused a fuel pressure drop at the engine, and a bit of stalling. Loosened the gas cap and the hesitation went away. Eventually I replaced it when I made my next cdan order.
 
Bogo said:
Is it puffing air out, or sucking it in. I had a bad gas cap that caused a strong vacuum to form in the tank. When the vacuum got strong enough it caused a fuel pressure drop at the engine, and a bit of stalling. Loosened the gas cap and the hesitation went away. Eventually I replaced it when I made my next cdan order.
Click to expand...

I think it's letting air out, however I'm not positive. Hmm, I'll have to give that a try and see what happens.
 
Alright, so we did the timing on it today, the air gap was good and it's sitting at 5 degrees. After doing the timing and poking around a bit I found that the ground wire for the alternator wasn't connected and also found a vacuum line that had fallen off... So, after putting these back on I took it around the block and it's running great...
 
Unmetered air is a killer on these engines. Hope you didn't hurt anything running it so lean. Eh, these things are tough, I'm sure it's fine!
 
Well, the driveshaft fell off the other day, which caused the truck to shake pretty violently for a bit because it came loose while I was on the freeway and by the time I got pulled over it came off... Since then the same misfire stumble bs is back again... I checked for vacuum lines that may have popped off and didn't find any, weird stuff... I'm pretty stumped and ready to drive the thing off a cliff.
 
You must log in or register to reply here.

Share this page

Back
Top Bottom