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1995 L99 Rough Idle/Hesitation

4K views 5 replies 4 participants last post by  WyrTwister 
#1 ·
Hey guys,

My '95 has been acting up lately. Had our first snowstorm here last night, and when I left work, the car seems like it's only running on 6-7 cylinders. Surges really bad at low speed when its warmed up. Has no power at WOT, and rough idle. It is NOT throwing any codes.


Got the car home, checked to see if there was snow around the WP or Opti, it was bone dry. Checked the air box to see if snow had worked its way in there... there was a little moisture. Took it apart, dried it out, cleaned the MAF, cleaned the K&N filter. Every part of my intake sat in the house overnight, just to make sure it was dry.

Started it this morning, was perfectly fine on the cold high idle... as soon as it started to show temperature, it started up again.

I honestly have no idea where to even start. IAC? Injectors? FP Regulator? Fuel pump? PCV? I replaced the Opti, wires, plugs, WP gaskets about 500 miles ago. 86,000 miles.

Thanks for the help!
 
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#5 ·
I agree, I chased a misfire problem for a LONG TIME! Found out it was a few wires arcing on the block.... Pretty dumb I didn't replace the wires but I was ignorant as its not the easiest thing to do. Problem was I replaced the one bad wire but I had multiple arcing wires so I would fix one and it would be ok for a short bit them it would start misfiring again. ( Misfires are insanely annoying!) That problem taught me a thing or two. haha
 
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