2000 Chevrolet Blazer Repair Question
Topics covered: Egr valve, Gas, Intake valve.
Mileage: 190,000 miles.
Mileage: 190,000 miles.
Asked on September 5, 2012
Why does the engine miss on cold startup,and not when at operating temperature?
2000 blazer 4x4 has new tuneup,new TPS,new IAC,new MAP sensor,checked EGR valve for carbon buildup,very little and function.Did not check for electrical,though.It was in closed position and seated when I pulled it.On cold startup in morning,starts fine,idles fine,idles down fine,when I start driving it,it has a severe miss until it reachs operating temperature.It runs fine after reaching peak operating temperature.It is now 78degrees in morning and 100degrees in the afternoon.Hope you can make some sense of this, and give me some solutions.Thanks,Robert
Asked by robertd55Answer
Replied on September 6, 2012
could be injectors needing service. could be carbon on the intake valves.
did you replace the wires and cap and rotor?
Roy
Replied on September 6, 2012
Yes and this missing did not start till 3000m later.
Replied on September 6, 2012
have the injectors professionally cleaned. gas tank additives have little or no effect.
Roy
Replied on September 6, 2012
Since Ive had the vehicle Ive always added Lucas or something similar to tank.Thanks,Robert
Replied on September 6, 2012
not good enough. theyy need to be direct injection cleaned.
Roy
Replied on September 6, 2012
Then,why would it not miss all the time,after it warms up also?
Replied on September 6, 2012
If it had a dirty injecter would it not miss all the time?