Jguy69

I'm looking at a '92 ZR-1 and want to know what to look for. It has about 92k miles. It will be a weekend fun car.

Z51JEFF

ZR-1 items would be fuel injectors and the vacuum system for the secondaries. One thing that nobody ever mentions is look at the underside of the floor. I've seen plenty of cars with busted floors. The fuel injectors are junk in the early cars but most likely with that mileage they have already been replaced.

1LEZ

Be sure to check the shifting of the transmission too. If they are driven hard the syncros will be bad. The tensioners are bad about wearing out too but they can be rebuilt fairly easily

FASTAZU

Here is a great site. I highly recommend some reading here.

http://www.zr1netregistry.com/Market...yersGuide.aspx

Good Luck.

ccmano

That all depends on what it is that you are looking for. If you don't work on your own cars and as you say you want a fun weekend car that is reasonably reliable you will need a car that has been upgraded with at least some of the major known ZR-1 and C4 issue already addressed. If your like me you enjoy wrenching on the car and the challenge of fixing everything. I look for a solid car at a bargain price and do the work myself. To me that's a fun weekend.

I'm sure I missed few but here you go.

Known major issues ZR-1 some related to higher miles some not.
Injectors
Vacuum leaks
Secondaries operable
Ingnition coils and wires replaced
Timing chain noise (normal to a small degree on 90's)
Starter
Oil leaks especially the pan and oil cooler lines
Fuel pumps
Is it throwing any engine, abs or body codes (multiple possibilities here)
Are any DIC lights on. (Multiple possibilities here as well)
Is the adjustable shocks system working
Windshield delamination
A/C functionality (compressor is unique to the Z, cooling capacity lower)
Power switch functionality and keys (are there 2)
Transmission syncro's, (first gear is always noisy) shifter alignment can mimick synco problems.
Clutch functionality (they all let in high, was it ever changed)
Egr system on later models
Engine mounts

C4 Issues
Head lights operable
Radiator blocked or simply clogged, electric fans operable
Wheel bearings
Suspension bushings
Condition of all door, top and hatch seals
Glass roof cracking
Instrument cluster functionality especially the tach (tends to read high with age) also note the lighting of the cluster.
DIC button functionality
Steering wheel excessive movement
Radio functionality (especially speaker amps) and antenna
Sport seat functionality (transmission, switches, pumps and bladders)
Door window switches
Door window lifter and internal rattles
Fuel tank bladder collapse (results in small capacity)
Differential noise (whine)

H