Need help boggled!

**97dsmturbogalant** · 02-05-2009, 11:53 PM

I Know this is a galant forum, but its basically in the same neigborhood. My bro just baught a 99 eclipse gs spyder with the auto and 4g64. The lifters were bad, so we replaced all 16 lifters and its smooth now. The problem is the motor runns fine when it is cold, and then when it warms up, it boggs down and its got a low jumpy idle, it backfires just a tad out the intake, but yet if you get it above 1500 revs, it runs like a champ. Weve allready replaced the maf and it helped a little but still does the same thing. Any insight into this problem would me helpfull.

**mko** · 02-06-2009, 12:41 AM

have you messed with the throttle position sensor? theres some wrong with the throttle body area. cheack the base idle screw, iAc

**97dsmturbogalant** · 02-06-2009, 01:08 AM

would the iac or the throttle screw make it misfire like that?

**97dsmturbogalant** · 02-06-2009, 01:23 AM

Also every now and then the idle jumps to 2000 and stays there unless i mess with the throttle.

**Galant306m** · 02-06-2009, 03:03 AM

Cam position sensor?? When i see backfiring out of the intake i think timing is off.

**mko** · 02-06-2009, 05:04 AM

if cam position is bad, it wouldnt start at all

**qnz** · 02-06-2009, 07:40 AM

i had a similar problem with my 2g. I think it was TPS sensor. i also cleaned out my throttle body at that time. after I did those 2 things, my jumping high idle problem was gone. i also adjusted the BISS screw to raise the low idle.