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Subject Topic: Serious Help Needed! RE: 1998 Post ReplyPost New Topic
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gatorfan0312
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Posted: Mar 31 2008 at 9:56am | IP Logged Quote gatorfan0312

Re: 1998 SE, 4x4, standard, 4 cyl    

I am hoping that someone out there can help me.  This is a very long, drawn out dilemma, but I will try to shorten.......  Any help at all will be greatly appreciated.

In Sept. 2006 because of a mouse nest the Mass Air Flow Sensor had to be replaced.  Before this was discovered the catalytic converter was taken off & a straight pipe was put on (w/out my approval).  After the MAF was replaced it ran pretty well, but not as good as could be, due to no Cat. Conv. 

All of a sudden started running poorly, not idling, not wanting to accelerate, etc.  Was told "to get the converter put on again & that should fix it".  Had that done & now running even worse.  Has been with a local mechanic for 12 days & was just told "I can't figure this out".  Even though the computer wasn't showing it, he took the MAF off another identical year, etc. & it didn't make a change.  The truck will run with the air filter off, but if you even put your hand over it, it won't idle.

Please, please, any suggestions out there?  I really don't want to take it to a dealer.  They really took me for a ride the last time.

Thanks!   Michele

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thedave360
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Posted: Mar 31 2008 at 1:19pm | IP Logged Quote thedave360

I did not have a mouse nest in my MAF...but I had a similar problem of the truck not wanting to Idle. I had put on a Cold air intake, it ran great. I took the thing off to clean it and the filter, after I put it back on it ran horribly!  After much looking and trial and error,  I found it to be the vacuum hoses. If the vacuum hoses are cracked or  not sealed well you will have problems.

Has the truck sat up for a long time? I say that because of the mouse nest. You may want to look other places for crap thats in the truck, like the Intake and the exhaust systems. When the CAT was put back on, was it the original cat that was cut off the truck? There may be something that crawled in the CAT while it was off the truck and is blocking it.

Also, you may want to try replacing the Oxygen censor(s). Sometimes a bad O2 sensor can look like a bad MAF sensor.


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Baton Rouge, LA
'04 Frontier XE
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Flowmaster 40 Series Exhaust
APC Air Intake
Red Calipers & drums
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