im about to give up

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Jan 19, 2008 | 09:15 PM

f16z28

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Teching In

Joined: May 2004

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From: Moorpark,CA

im about to give up

This has happened twice to me now. When i pull up to a stop light the rpms get very low around 300 and the engine stumbles and shakes the car like it is about to die and then recovers as though nothing happened. Also I noticed when i accelerate from a stop that it hesitates a little to start then is fine. i have no other problems. I got an auto tap and had the lean codes on both banks. i have installed the slp cold air kit, slp maf, slp throttle body, slp thermostat, slp smooth air bellow, msd wires, bosch platinum plugs, slp loudmouth exhaust, 3'' y pipe, edelbrock shorty headers w/jet hot coating and an arp underdrive pulley. i installed all of those mods about 30k miles ago and never had a problem. the car currently has 112,000 miles on it. i am also trying to sell it so i dont want to spend alot of money. any ideas?

Jan 20, 2008 | 12:01 AM

McMuffin

Staging Lane

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From: lakeland,fl

check on a tps sensor or iac sensor.

Jan 20, 2008 | 08:39 AM

INMY01TA

11 Second Club

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From: Crofton Md.

Too many SLP parts. lol

Jan 20, 2008 | 10:15 AM

wssix99

Save the manuals!

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From: Chicago, IL

In addition to your IAC, try cleaning your MAF sensor. (You'll need special MAF cleaner or non-residue electrical contact cleaner.)

If your MAF is fouled, it won't sense all of the air coming in to the engine and will trigger the ECM to lean out your mixture.

Jan 20, 2008 | 11:26 AM

01WS6/tamu

TECH Senior Member

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From: somewhere in TX

Check the pcv fittings to see if they have collapsed at the throttle body and around the back of the intake manifold.

Jan 20, 2008 | 11:30 AM

D-Webz

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From: KC

Check the fuel pressure. My fuel pump went bad and it did the exact same thing. People kept telling me it could not be the fuel pump because they just go out completely. So I went and got a fuel pressure gauge and sure enought I was running like 25-30 psi fuel pressure when its supposed to be 58-60 psi.