Topic: ASR problem on a '94
in Forum: C4 Electrical
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Need some help.. Not sure where to post this.. have looked in archives and came up empty.
My '94 was running fine when I
suddenly had to hit the brakes very hard. No wheel lock-up but had to stand on
brakes pretty hard. Frankly, these brakes never seemed to grab very well (I've
owned it 5 yrs).
Quarter mile later, was going about 25 mph... engine suddenly stumbled, nearly died, but recovered. And I noticed Service ASR light and Service Engine lights both immediately came on.. could tell engine was not running right but got it home. Later, it started again but with difficulty. Now it wont start at all.
I borrowed a code reader from local auto parts store.. but it could not read the codes. Funny thing is my car has a OBD2 connector, even though OBD2 did not begin til '96,... I've read that some '94/95 Corvettes got the new connector, but still have OBD1 system behind the OBD2 connector. Can anyone confirm this?
Appreciate any ideas anyone might have on what might be wrong.... and/or any ideas on the code reader issue, too.
Quarter mile later, was going about 25 mph... engine suddenly stumbled, nearly died, but recovered. And I noticed Service ASR light and Service Engine lights both immediately came on.. could tell engine was not running right but got it home. Later, it started again but with difficulty. Now it wont start at all.
I borrowed a code reader from local auto parts store.. but it could not read the codes. Funny thing is my car has a OBD2 connector, even though OBD2 did not begin til '96,... I've read that some '94/95 Corvettes got the new connector, but still have OBD1 system behind the OBD2 connector. Can anyone confirm this?
Appreciate any ideas anyone might have on what might be wrong.... and/or any ideas on the code reader issue, too.
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lanoka harbor, NJ - USA
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Vette(s): 1990 L-98 white/ red/black leather interior targa top auto
1975 L48 blue/black leather interior t tops auto
if you jump the A & B terminal cant you read the codes by how the ses blinks. usually the scanners in auto stores only read obd2.
the dynamic duo
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Duncanville, TX - USA
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Vette(s): 1985 Coupe-L98/Auto,Bright Red/Carmine.
1974 Coupe-L48/4speed, Medium Red Metallic/Black Deluxe.
Don't know about the '94 cars having the OBDII connector, but I do know some of the '95 cars were equipped with it.
Are you SURE it is a 16 pin connector? Either way, once the vehicle is ID'd, the scanner/code reader should communicate with it, as long as you have the connector that will physically fit the connector on your car.
The ASR should not be activated at all on a stop like that, so I don't know why it would be throwing a light for it. ASR has more to do with controlling tire spin on acceleration, and on roads with less than optimal traction(ice/snow, etc). The ABS system should have engaged on a hard stop like that.
Really need to pull the codes to give us a place to start with it. You should be able to jump across the pins on the connector and get the codes, but I don't know if that will give you the ASR codes....lemmie look and see if I have that info somewhere....
Are you SURE it is a 16 pin connector? Either way, once the vehicle is ID'd, the scanner/code reader should communicate with it, as long as you have the connector that will physically fit the connector on your car.
The ASR should not be activated at all on a stop like that, so I don't know why it would be throwing a light for it. ASR has more to do with controlling tire spin on acceleration, and on roads with less than optimal traction(ice/snow, etc). The ABS system should have engaged on a hard stop like that.
Really need to pull the codes to give us a place to start with it. You should be able to jump across the pins on the connector and get the codes, but I don't know if that will give you the ASR codes....lemmie look and see if I have that info somewhere....
Joel Adams 
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
http://www.digitalcorvettes.com/forums/showthread.php?t=22897
I was trying to get both links up in one post, but my dsl router is getting ready to go belly up and I keep loosing my internet connection
anyway hope this helps
SAYWHEN 2011-08-16 15:54:47
anyway hope this helps
BTW i imagine you'll find the ASR light is a result of the code stored in the PCM JMO
Thnx much Saywhen... that article was very helpful. Clearly confirms OBD2 connector is correct for 94s, but still with an OBD1 system. No idea why reader wont retrieve the codes.. maybe try another code reader.
And agree with AA .. ASR code was odd. And now, after leaving it sit for 3 days, I have a dead battery that wont recharge. I'm thinking I may have a bad battery (only 14 months old), though I cant logically connect a bad battery to ASR light.. other than uncommon is sometimes common with all this electrical stuff.. I know there is a logcical answer.. just havent found it yet...will try a new battery just in case thats the cause.
Thanks for the help/thoughts guys.. appreciate any other ideas you might have.
OK... replaced the battery.. but still wont start.
Cranks over real well, but wont fire.
Cranks over real well, but wont fire.I'm thinking this is connected to fuel cut-off in some manner. If that makes any connection for anyone, please holler. Otherwise I have no idea what it is, and will have to have it towed in.
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Without the ability to get codes, it's gonna have to come down to checking the obvious stuff first. So I would have to start by finding out:
Does it have fuel pressure?
Does it have Spark?
Does it have compression?
It's possible that the hard braking could have shifted something enough to cause this, like a wiring harness somewhere. Or it may have shifted/moved something enough to cause a fuse to pop. Have you checked any of the fuses, just for fun?
I just can't see the ASR system causing rough running or no start, UNLESS the '94 uses a system that retards the timing, or does something with the fuel injection, to control the wheelspin. I know the early ASR systems simply loosened up on the throttle cable...
Does it have fuel pressure?
Does it have Spark?
Does it have compression?
It's possible that the hard braking could have shifted something enough to cause this, like a wiring harness somewhere. Or it may have shifted/moved something enough to cause a fuse to pop. Have you checked any of the fuses, just for fun?
I just can't see the ASR system causing rough running or no start, UNLESS the '94 uses a system that retards the timing, or does something with the fuel injection, to control the wheelspin. I know the early ASR systems simply loosened up on the throttle cable...
Joel Adams
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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Vette(s): 1990 L-98 white/ red/black leather interior targa top auto
1975 L48 blue/black leather interior t tops auto
just a thought here. says it's cranking fine but no spark. sounds like it could be a fuel problem but as joel said you have to give us answers to his questions. just a thought here for what itis worth. when was your fuel filter changed last? maybe the hard braking loosened up some garbage and it restricting the gas flow.
the dynamic duo
c3vr life member #97
Sorry, been away for awhile. My car is still not running but think I'm finally making some progress.
First, I found the battery had a bad cell, however, dont think that had anything to do with the car not running. It probably failed from all the attempted starts.
With a new battery installed, I found there is no spark at the plugs when I cranked it over. So... am now suspecting the Opti-spark. It was replaced just 2 yrs ago and only driven 500-1000 mi/yr since. Spoke to Gordon Killabrew at Carlisle and he thinks its likely the optispark... and is possible it could have failed again.
Never did get an OBD2 reader to work. So tomorrow will try to jumper #4 from the left to one directly below, and read the flashes. Think if I get a 36 code, that suggests opti-spark. Does anyone know for sure? Or if anyone has other suggestions, let me know.
in Forum: C4 Electrical
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