0Don @ Corvette Mike

hey guys,


A friend picked up a 1991 Z from a dealer and when the jerks got it they POWERBLASTED the motor(motor was dirty). Right now the car will not go over 4,000 RPM and he has taken it to 1 good Z mechanic & one other shop. They are nickle & diming him to death

Any ideas as to why the car won't go over 4k RPM? Change out the injectors?

thanks

Don

zr1fred

I'd lean toward spark problems. JMO

ZR-71

Yeah some moisture may have gotten inside the spark plug wiring down inside the cam covers from the power blasted water. Pull the wires and use pressurized air to dry it all out.

BennieC.

What did that "1 good Z mechanic" says wrong with it? Did he have a clue what's wrong? Have your friend give me a call at my cell phone. I would love to take a look and diagnose it but I assume he's in SoCal. He can call me after 5 pm or anytime on the weekends.

916-715-4516

Goldcylon

Hmm my guess is the coil packs are probably toast and perhaps the secondary actuator as well as they reside under the plenum. Your plenum valley is probably plugged so all the electrical componets are still well... moist. l I predict you will be a member of the pulling the plenum club soon. Id give the compressed air trick a try as suggested first.

ZRWON

Don, Hope the water doesn't also lead to future peoblems with the starter in addition to all the other things mentioned about water under the plenum. I think you should get it to a recomended ZR-1 repair shop ASAP. Try this guy he's excellent and close to you:
Leonhardt Automotive
2950 E. Coronado Unit C
Anaheim, Ca. 92806
714-630-4510
Gary Leonhardt
He has owned ZR-1s personally and is a 1 man Corvette repair shop...been in the business of repairing Corvettes since 1982, & performs general repairs and maintenance, had experience with the common ZR-1 problems like VATS, starter, chain tensioner noise, leaking oil pressure senders, HVAC etc. Don't trust anyone without a proven record of success and training to get near the ZR-1...especially the LT-5 motor!

neat

A detailer hosed down my LT5 about 5 years ago. After about a week, the starter stopped working from sitting in standing water.

I agree, I think pulling the plenum is in your future.

0Don @ Corvette Mike

thanks guys,

Bennie's # was passed to my friend Chet (who is Internet challenged)... Thank you so much for your time and effort!!!!!!

94ZR1

RedRiderZR1

If you plan to take it to Leonhardt Automotive give him a call first and make an appointment. I haven't been able to catch him at his shop just driving by.

Greg

turbo-max

pulling the plenum is not as bad as some make it out to be, hell, i've pulled one a few times in the same day testing stuffs on my friends car.