Join Date: Jul 2009
00bluegtp is offline
CPI Unit gone bad?
I have been trying to diag. this idle problem i have been having for a while now. I will first start off with what i have done. 1. I have replaced the fuel pressure regulator as i found that the passenger side of the lower intake was washed out, but did not fix the idle issue. 2. Cleaned and installed screened gasket on egr valve, still same issue. 3. Replaced fue pump and filter, still no fix. 4. Replaced distributor cap and rotor, still same ruff idle. Ohh and the plugs and wires are new within the past couple of weeks. So I was out driving the truck around and then took it home for it to cool off so i could pull the plugs and inspect them. I pulled the pugs and found that everyone of them was wet and smelled somwhat like fuel. I cleaned them off and reinstalled them and it ran well for about 30 seconds and them it started running rough again. It only runs rough at idle but the problem i am having is I have no black smoke or any smell of fuel for that matter. Do you guys just think my injector is leaking? What else could it be? I have checked the spark with one of those testers and it seems good, very bright. I ordered a new cpi and supply and return lines do you guys think that will repair it? The truck still has tons of power while accelerating.
1994 s10 P/U with 6inch lift and fisher MM plow
2000 GP GTP 345 WHP/dynotech stage 3, 3,000 stall protorque converter/stg 2 heads/ xpz cam/ gm torsen diff/ pacesetter headers/105# springs/autolight 104's/ tuned by me
2003 Trailblazer LTZ
Last edited by 00bluegtp; 07-23-2009 at 10:22 PM.