MAF causing a sputtering idle.

[cRaZySHO.]

Okay, this has nothing to do with my other post. I cleaned the manifold because I was bored today. But ever since I put in my 75mm Pro M the other day, my car has a really lopey idle. It runs great on the top end, and at part throttle, and just cruising. It just won't idle worth a damn. It dips down to 500, and then jumps to 900, and back down again. It even stalled once the other day. And I unplugged it, and it runs fine. Just throws the obvious CEL. I'm lost on this one. I'll be calling Pro M tomorrow.

 

[Mr Anonymous]

Maybe an obvious question, but did you try resetting the idle speed program with the Pro-M installed?

 

[cRaZySHO.]

That sounds like a good idea. Only thing is, the instructions don't tell how to do this. I know we have many members with Pro M products, anybody want to drop some info my way?

 

[revhardSHO]

That sounds like a good idea. Only thing is, the instructions don't tell how to do this. I know we have many members with Pro M products, anybody want to drop some info my way?

SDPATTS write up:

1) Disconnect the negative battery terminal.
...1a) Optionally, disconnect the keep alive memory connector in the small wire also landed to the negative battery terminal. You can then wait the 15 minutes, reconnect the plug, and go to step 6).
2) Turn on the headlight switch.
3) Wait at least 10 minutes.
4) Turn off headlight switch.
5) Reconnect the negative battery terminal.
6) Start engine normally (never press on the gas pedal).
7) Allow idle speed to settle for at least 30 seconds.
8) Within 70 seconds of starting the engine, apply all accessory loads the engine will see at idle. Do these concurrently.
...8a) Climate control to MAX A/C.
...8b) Headlight switch ON, brights ON.
...8c) Turn steering wheel 1/4 turn side to side.
...8d) Press brake pedal.
...8e) ATX SHOs only: shifter to DRIVE.
9) Do not turn off engine for at least 5 minutes.
10) It is preferable that the car be driven immediately after setting the idle programming.
11) While driving, allow the coolant temperature to rise to the normal range.
12) Run the car through its entire performance range.


good luck

 

[NotSoSlowSHO]

Edit: Beat me to it squint

thumbs_u

<small>[ February 16, 2003, 08:29 PM: Message edited by: NotSoSlowSHO ]</small>