slight idle problem at startup
Ok, let me see if I can describe this one.
Intermittently when I start my 02 4.0 Laredo it will fire up and be at 900-1000ish rpm, 2 seconds later is will go up to 1200 - 1300 then go right back down to 1000, and idle fine until warm up at 650 ish.
The idle doesnt fluctuate up and down more than the 1 time.
I removed and cleaned the IAC, and TB. I was thinking I might need a new fuel filter? might do it anyways just because she has 194,000 on her. I bought it at 192,000 and dont know the previous maintenance.
Anyone else ever run into this?