Mrspencer

Did the plugs and wires on my 85 s3 5.0L, the old ones were some split Grove crap,that had been in the car for some ,anyway put Bosch iridium, in the car now the car won't Rev past 5k, I haven't done the cap and rotors yet, everything was great before the plugs and wires exchange. Any advice.thanks in advance.

soontobered84

928s like plain old copper plugs. I have heard stories of folks using platinum plugs, etc., and having all kinds of issues.

Just Plain old copper plugs.

RT930turbo

Is it an automatic, and are all the cables properly adjusted?

Mrspencer

it's a 5spd no cables to adjust, so I guess I'm doing plugs again this time copper ngks. There went $ 100.00 in plugs I can't use.😂😂🍻

Mrspencer

Wow copper only, OK so I have ordered the NGK copper plugs, these girls sure are moody,I hope the power comes back.
I thought that the iridium plugs would burn better, the car honestly feels like it's governed, she won't pull past 5k.

davek9

Check the Coil ends (look inside too), then use a Temp gun and make sure all 8 are getting hot, if not then use an inductive timing light on each plug wire to see if its getting spark.

IMO: Plugs "Bosch WR7 DC +", Caps and Rotors should all be done at the same time, (all wear items) to keep proper electric loading/resistance on the Ignition system.

If all the sensors are good w/ clean connections, that is 99% of the tune-up.

Edit: How was it running before you did the initial work?

Dave K

RFJ

A good idea to ask questions first always saves money.

Mrspencer

Ran awesome,before the work did caps and rotors and new copper plugs, before this post she's running great now engine feels tight tune up been long overdue.way before I owned it. Pulled the new iridium plugs out they are rustic looking only been in there a week any ideas.

soontobered84

The 928 engine was probably trying to spit them out.