Question : 2 Questions

[Ghettoracer]

The first question is: My tachometer in my instrument cluster seems to be sticking. Is this a common problem? Is there a fix for it?

Second Question is: My EGR valve clicks when I rev up the engine. What is causing this and how do I fix this?

My vehicle is a 1993 Pontiac Grand Prix SE with a 3.4L MPFI DOHC V6 5 spd. Thanks!

[robertisaar]

assuming you have the same/similar cluster as my wife's GP:

there have always been problems with them... from the low fuel/check guages light being on 100% of the time due to a bad solder joint and the sticking you mentioned, and i'm sure others as well...

what do you mean by it clicks? is it stupid-loud? it should be hard to hear over the noise of the LQ1...

a way to test the EGR is to connect pin D to a good 12volt source, and then connect pins A B and C to known-good grounds(one at a time) to see if a certain valve is sticking.

EDIT: if the lead arcs and you don't hear the solenoid move, its bad. you should hear it easily if the engine is off.

[Ghettoracer]

The ticking or clicking I'm hearing is like when I rev the car up it would sound like an injector that's really really loud. Kinda sounds like a spark plug arcing its spark on metal. When I let off the throttle, it stops clicking. Its just really annoying!

[robertisaar]

test them the way i described, or if you have a tech1 or 2, do it that way. with the tech tools, you open the valves when the motors running. solenoid 1 should make it stumble noticeably, solenoid 2 should almost kill it and solenoid 3 should kill the motor unless its got a VERY tight tune...

[Ghettoracer]

I ran your test, all 3 solenoids seem fine, opens and closes fine, took a little carb cleaner and cleaned out the inside and the diaphram of the solenoid with open/close test and cleaned most the carbon out. Ran a idle re-learn and now it seems to be running fine without stumbling! Its amazing what 20 minutes of your time can make a difference. Now to the sticking tach prob.

[SofaKingWeToddDid]

yeah i needs to cleans my egr... car is stalling now and then because of it.