S13: Cold start bogging and horrible idle!

[lalo167]

Whenever I start my car it instantly starts to bog. I've been able to stay on the throttle and keep revving it till it warms it up. Today I wasn't able to do that, it seemed like i was out of gas and would keep bogging even at 4k RPM.
Once its warm it runs fine. I disconnected my MAF, turned on the car and it ran perfect! So I warmed it up that way, after like 5 minutes I connected the MAF and it started idling from like 800k to 1400k. While driving it runs fine, when ever I'm stopped it idles from about 800k to 1200k

I cleaned the MAF and IACV, and installed new spark plugs so far.

My guess is that I have a bad MAF. I'll be going today to try another one on and possibly buy it if it fixes the problem.

Any other suggestions on what it might be?

Thanks, Lalo.

[falling angel]

Hmm, Might I suggest you pick up a coolant temperature sensor?

[lalo167]

Changed MAF and no difference. It might be the coolant temp sensor. I started the car today and was messing with the wires, i moved the coolant temp sensor and it suddenly started running perfect so ill be checking all my wiring and replacing that sensor.

[ShadowMan]

I'm in the same boat, been through everything, finally just ordered a new coolant temp sensor, should be here wednesday. Cleaned my maf, changed my maf, installed a new engine harness from wiring specialties, these all helped the idle considerbly so I don't consider it wasted money but I really hope this new coolant temp sensor does the trick. Therre are 2 different coolant sensors for the ecu though- one thats rectangular, and one with the corners rounded off, just make sure you get the right one. 35 bucks brand new shipped from frsport.