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

[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?

[etlsport]

http://autorepair.about.com/library/a/1h/bl023h.htm

here are some more suggestions as to what it could be.. good luck!

[IndianaVX]

hey chris,
there is a good mechanic here in martinsville, towneview auto clinic, he is where i have always taken my amigo, and other autos, prices are maybe a little high, but the quality of work is also. and he is a really good guy. his name is terry buster, his wife is brenda, she will answer the phone. tell em i sent ya their way. I have also always heard that Indy motorworks,in greenwood does good work, and they are a little closer. if you come to martinsville, ill give ya a ride back home if you want.
david

[climbcovey]

thanks david, I might take you up on that next week, THANK GOD for my old beater work truck!!!!!!!!!!!!!!!!!

[climbcovey]

So, truck still has the code, but does not set off the MIL, however truck runs fine until warm then the idle is sticking at about 2300rpms, and a second code pulls up (still no MIL). now I have code p0101 and P1404 showing on my scanner. truck is starting and running fine except for the rpms when warmed up after looking at all the codes beginning to think the PCM is going bad..... any thoughts?

[Ldub]

1404 indicates the EGR valve stuck closed...if that info. is of any help.

[climbcovey]

yeah, already replaced egr valve about 1 monthago

[climbcovey]

Originally Posted by climbcovey
Sure did! Turns out the engine wiring harness had a bad connection, Isuzu wanted to replace the whole thing at the tune of $450 Part, $650 labor. But only one harness in the country so they would have to order it (I found the 1 harness with the help of merlin, I got it on hold for a price of $350. Then I went home, disconnected all the connections of the harness under the hood, cleaned them with electrical cleaner, lubed them with di-electric grease and problem solved! Cancelled the parts order and saved $1050. I did however still have an idle problem ( sticking and/or slow to return to baseline) That turned out to be a gummed up IAC (?) sensor. I think that's what it was called but its located on the front/top of the throttle body and controls the idle. I cleaned this with throttle body cleaned and sea foam, as well as the egr once again and put a screen on the egr to burn off any excess carbon and prevent build up. Put it all back together and she's as good as new. By the way, I am at work right now would you mind cutting and pasteing this email to that thread so all can read? I can't do it at the moment. Thanks Chris