There's got to be a solution??? (THERE IS, PROBLEM SOLVED!)

[VCrossfan]

Get a MAF/MAS from Napa (They carry some oem) and try it and if it doesn't work return it. But being electronic make sure they will take it back. It gathers info on the amount of air going in and tells the computer how much fuel to deliver...worth a try.

[WormGod]

I have had this exact issue for a couple months now. The fluctuating idling at startup that. If it happens to stall during these fluctuations, I get a CEL. ONLY if it stalls though. Did the whole new Air Filter, cleaned MAF, cleaned EGR, and it was good for about 2 weeks, but it came back. The scary part is, if the VX isn't running at a normal temp/warmup, it will do it. and when you are stepping on the brake and it suddenly wants to rev, you gotta be ready to step on that brake just a bit harder. Once she is warmed up, she cuts that out though.

I have been trying to troubleshoot whether I was running lean or rich. Both can cause fluctuations, but both also have different exhaust signatures. I don't have dark emissions so I am leaning towards running lean. My next step is to replace the FPR and clean the S/C fuel rails, in case of some residue/blockage. Probably replace the EGR while I am at it. I have been saying this for a few weeks now, but with tight pockets and winter starting to shadow me, I think I am allowed to continue to procrastinate.

[VCrossfan]

I think I am allowed to continue to procrastinate.

lmao...Classic

[iamironman]

I will try everything suggested... but... is there a way to adjust the rich/lean? Or is it totally controlled by the MAF/ECU? Or other sensors communicating with the ECU.


THANKS!!

[Solitude]

I will try everything suggested... but... is there a way to adjust the rich/lean? Or is it totally controlled by the MAF/ECU? Or other sensors communicating with the ECU.


THANKS!!

I am probably speaking out of turn here.. but I think the only way to adjust the parameters is with a computer and isuzu software. These don't adjust like a carb.

good luck
Jeff

[iamironman]

I thought so... thanks for all the info. I ordered the FPR and MAF/MAS... 'twill be here tomorrow...

[iamironman]

Ok, it was the FPR!!!

I got the parts in and first tried the MAF... for obvious reasons... it was easier... NO change... still 'idle surged'... left the MAF on... new fuel filter... NO change... so I put the original MAF back on and did the FPR... WORKED like peanutbutter-smooth n creamy.................
perfect idling, perfect acceleration-WAY better pick-up, just all around smoother in EVERYTHING it does... so I put the new MAF back on and it seemed to do even a little better... (the onl reason I switched back to the orig MAF was troubleshooting 101, eliminate all possibilities to see what the root cause is).

Thanks for ALL the input... I think I'll keep her, she's muh huckleberry