tapping, gm said.....

[Jculler1610]

I have posted before but in here but most prob dont know me, I am a 93 z34 owner, love the car to extemes just not the mechanic, I try but I can do only simple stuff,
Well my prob is when the car idles its rought and when the car is at renning temp, it kind taps when it hitts the height of th idle, well not gm but a chevy dealer said to replace the fuel filter, and put oem plugs and wires, if that doesnt do it it could be the T- postion sensor.

I thought possible the timming was off, ne thought before I get the oem shit


I have boush plugs and acclight wires

thanks

[your_I.D.]

How does it run going down the road and on acceleration?
How many miles are on the car? Have you done a t-belt on it?

[93Oldsdroptop]

First of all, get rid of the Bosch plugs. Get some GM AC RapidFire plugs instead. The ignition system is a waste-spark system which destroys those import plugs. You'll be surprised how much better the engine will run. Idle will smooth out, then you can go from there.

[Fierobsessed]

ACK Bosch Plugs!!!

Notice the white spot where the electrode was. It burnt clean off after about 40 miles of use. Wasted spark motors eat these plugs rather quickly. The owner was complaining about misfiring. When he told me what kind of plugs he had, I knew right away what the problem was.

[SappySE107]

Get magnecor wires (expensive) or the cheapest set you can get and plan on replacing them every 30-60k, though I would lean more towards 20-30 on cheap wires. AC Delco plugs are fine, no need for rapidfires unless you wanna spend more money for no gain in any way you look at it.

TPS could cause it to idle rough but unless you scan the computer and check it out, I wouldn't start throwing parts at it. Do the plugs first for sure, and then see how it runs.