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1G hard to start when cold and surging. timing issue?

redfield102j

Proven Member
174
7
May 12, 2015
Spring Creek, Pennsylvania
Timing issue?

My car is hard to start when cold. It has a choppy idle going from 1000 rpm to 1400rpm. Ive checked TPS and all other sensors. It has a CEL after running for a couple min. I checked the codes and it says everything is fine no codes.

I tried to set ignition timing. With plug on fire wall grounded timing set to 5 degree BTDC. Still slightly rough idle. Unground plug and check timing and it retards it another 15 degrees or so.

lil lost and confused any input would be great. Thanks guys
 
Last edited by a moderator:

Pacey

Proven Member
45
5
Jul 26, 2015
Fenton, Michigan
Sounds like maybe a spark issue. Have you checked the wires to make sure they are producing a good spark. While your there,I would double check the spark plug gap as well.
 

redfield102j

Proven Member
174
7
May 12, 2015
Spring Creek, Pennsylvania
It has bran new ngk blue wires and bran new plugs. Was running good then it spit altornator belt and started to over heat. Parked it put new belt on and was gonna set ignition timing and that is when problem started. I will check all the plugs when i get home.
 

Pacey

Proven Member
45
5
Jul 26, 2015
Fenton, Michigan
Did you ever unhook your CAS? Apparently they can be installed 180 degrees out which will cause some issues obviously. Just a thought but if you never removed it after the car was running strong you can cross that off the list of possible problems.
 
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