my 84 z28 is runnin pretty good,but my engine light comes on after about 10 minutes.so i went to auto zone for that free diagnoses check,that i heard about on the radio,computer said that my coolent sensor was bad,so i replaced it and it still comes on? the car does seem to be running a little rich,do you think that has anything to do with it???,HAS ANYONE HAD THE SAME PROBLEM,please help

 

I got the perfect solution and it worked for me, just get some black tape cut a small piece, cover you SES light and there you go! But seriously sometimes mine has gone on with out anything wrong our ECM's like to throw random fits if it scanned nothing i wouldnt worry about it. later

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1988 Camaro IROCZ "MIDNIGHT CRUIZERS"
305 ci Tuned Port 700R4
3"Exhaust/Flowmaster 80 series muffler/Dynomax high flow cat/CutOut
hypertech chip/k&n filers, cut MAF screen gutted air box
"Theres no replacement for displacement"
My Iroc web page....
www.geocities.com/bobfitz82/index.html

 

I have the same problem, only mine seems to have something up with the EGR. Anyway, try disconnecting the battery for like a few hours if you don;t need the car. I think the reset time on the ECM is 30 minutes, but an hour should do. Anyway, when the ECM resets, it erases stored codes. If you still get this light, then I dunno, but I know it can be a little bit of a bother, especially when stupid passengers get all nervous because they think the cars gonna explode Good luck

Will

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'86 Z-28 305 c.i. LG4 165 hp E.T. 16.7 @ 82 mph on radials
Rochester QuadraJet 4bbl,
Flowmaster 80 series, Chrome Tips,
Dual Snorkel Air Cleaner,
K&N Filter,
Michellin P215/65/R15 X-Radial Plus,

Pioneer 4"x6" dash,
Pioneer 6"x9" rear,
Alpine 8" Type S in bandpass box,
MTX Thunder 4202 Amp,
Sony 4000X- x-Plode Deck 50w x4

Soon to be sporting a 350 HO somg legal conversion kit. 308 hp Along with Edelbrock Headers, Edelbrock Performer EGR Intake, and 3" Flowmaster Exhaust with DMH Electric Cutout!!!

 

The reset actually takes place as soon as you disconnect but most folks like to leave it off for a while. I just hate wasting time so I disconnect give it a minute or so and reconnect. You can just remove the ECM fuse and accomplish the same thing. Remember no power no memory.
For your problem looks like you need to find a buddy with a scanner and see if you can get some real time diagnostics with the engine running.

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92BLKL98
'92 Black Z28 Hardtop w/Harwood 2" cowl ind. hood Modded 700R4, MSD
Ignition, March Underdrives, TPIS Fastpak, Ram air w/gutted filter box, SLP Prom, Flowmaster, & free mods, removed cats, Amsoil synthetic lubes, CE SFC's, Edelbrock STB,Spohn TA,Roadtech LCA's and Panhard Rod, Energy Susp., PST polygraphite bushings, KYB Shocks.

[This message has been edited by 92BLKL98 (edited August 28, 2002).]