Possible Major Problem!!!!!!!!!!!!

[Tone]

Is 1.4 in spec? If you use the Workshop Manual CD it walks you through a number of tests to properly isolate the problem.

[uncle_asa]

Try the following: http://www.vehicross.info/forums/sho...4&postcount=15
By the way, did you checked your air filter? It could impact as well if it is enough dirty.
Also check the intake air tube for cranks. If it take some air beyond MAF somehow the engine might fail to run properly as well.

[MoonRaker]

If it happened after a fillup it might just be bad gas. Hook your fuel preassure tester back up, run the purge hose to a safe location, make sure you dont have any leaks, start the viehical. Put a zip tie around the purge button and drain the tank with the engine running, check the fuel if it smells at all bad thats probly your problem, it could also have alittle water in it. If that dosnt help, ill run you through some more things to check. Also check all of your plugs in your electrical system, throw some dialectric grease on every plug you can find. Ive even done that to all of the tranny plugs. Electrical problems are a bitch to diagnose when you have bad conections. Spend an hour or 2 going through it all. Trust me, ill help you fix it, screw paying some one to fix your VX. I also had a problem with the wiring harness near the tranny, it melted because the factory has it to close to the exaust, it caused tranny problems. If you have a short when you put it in gear that could also cause problems. Does it stall when you put it in drive, or just reverse.

[climbcovey]

Talk about a pain in the A**!!!!!!!!!!!!! Well after multiple tests and diagnosing I decided to try another MAF from a different location than the original "new" one I purchased thru advance. (The code for MAF kept coming up about 20 times) Turns out Advance sold me a defective part!!!!!!!!!!!!1 Got the second MAF in from Autozone and Now she purrs like a kitten! or maybe it should be called a roar cause It seems to me that I gained back some power that I didn't know was lost. Also while I was at it I changed the spark plugs which I had neglected to do for the first 95,000 miles. I put in iridium plugs ($12 each). Talk about an improvement to throttle response and power it is noticeable with these plugs. They actually gaurantee an increase of 10hp but I had my doubts about that. But, after putting them in.......its possible. Anyway, thanks for all the suggestions!



Hey Tone, did you get my email about the lights? Still haven't heard back from you.

[Ldub]

As we're on the MAF subject, I thought I'd post my experience...

I've been plagued with CEL's since Moab last May...She would run great around town in the lower gears, but as soon as I hit an on ramp & put a higher gear/ heavier load on, I could count on a CEL rearing it's ugly head...all codes pointed towards a vacuum leak.
Knowing that Isuzu intake gaskets were notorious for cracking/ leaking, I ordered a set from Merlin (read "god of Isuzu partzdom"...the man is good !).
After some nasty problems with the hard pipe (nicked the O-ring) obstructing the r&r of the thermostat (YES, I had to r&r the intake/ s/c TWICE ! argggh!)
After putting it all back together, THE SECOND TIME...I pulled the same codes...needless to say, I wuz bummed.
I emailed Jerry Lemond (a known GOD of Isuzu knowledge), he was kind enough to give me free advice that was worth ten thousand times what I paid for it, which included...

1. Check EVERYTHING downstream of the MAF sensor for leaks...this meant, I changed all my "bling" stainless braid vac. hoses/ breather hoses back to the real thing.

2. Carefully examine the sensor wires inside the MAF for crud...this meant, using electronics cleaner (Gunk) to spray off all the crud deposited by K&N filter oil...the sensor wires were a cruddy looking dark color when I started & shiny when I was done.

This zuzuite is now a VERY happy guy...I just returned from a road trip of over 1500 mi. (wheelin w/ da MWIOR gang) & not ONE CEL !!!

Suzy hasn't run this strong in quite some time & I've run one tank of so called "premium" through her that was 10% ethanol...still, no CEL !!!

I can't WAIT for Moab this spring !

[nfpgasmask]

I can't WAIT for Moab this spring !

Speaking of, I'll be coming this time around. I've never been to Moab.

Bart

[climbcovey]

AHHHHHHHH HELL!!! :madp: :madg:

Same problem again, same code, all with new MAF, I give up, I don't know what else to check. Can anyone recommend a GOOD SHOP in Indianapolis?