Another crank, no start!
Thread Starter
Intermediate
Joined: Nov 2013
Posts: 39
Likes: 0
From: Camrose Alberta
Another crank, no start!
Okay, so I have fuel pressure, i have 12 volts at injector plugs. wires look good around distributer. still cranks but wont start. It will catch and die sometimes. Also it will run while fogging intake with starting fluid.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Thread Starter
Intermediate
Joined: Nov 2013
Posts: 39
Likes: 0
From: Camrose Alberta
so here are the codes im getting:
13- oxygen sensor fault-signal too low/open left oxygen sensor circuit
15- coolant temp sensor or circuit fault- signal voltage too high
21- tps sensor- signal voltage is high
23- IAT sensor low/ MAT sensor or intake air low temp/ TPS error
25- MAT or IAT temp high. Spark referance (24x) signal low voltage
32- Electronic vacuum regulator valve error. exhaust gas recirculation valve diagnostic switch-closed during engine start up or open when EGR flow requested by ECM 3. MAP sensor signal voltage is low
41- Cam sensor failure. cylinder select error. Electronic spark timing circuit-open or shorted to ground during engine run. Ignition system fault-loss of 1x reference pulse signal
46- Power steering switch failure. VATS failure
51- Computer problem; faulty,wrong or incorrectly installed PROM circuit; or ECM/PCM failure.
53- system voltage too high (over 17.7 volts to ECM) or EGR system fault or alternater voltage not normal or Vehicle Anti-theft system fault.
so im not sure how many of these codes are old and were before i started trying to find this problem. I bought this car not running.
I was wondering how to erase these codes so i could run a fresh scan to wee which codes are still there.
13- oxygen sensor fault-signal too low/open left oxygen sensor circuit
15- coolant temp sensor or circuit fault- signal voltage too high
21- tps sensor- signal voltage is high
23- IAT sensor low/ MAT sensor or intake air low temp/ TPS error
25- MAT or IAT temp high. Spark referance (24x) signal low voltage
32- Electronic vacuum regulator valve error. exhaust gas recirculation valve diagnostic switch-closed during engine start up or open when EGR flow requested by ECM 3. MAP sensor signal voltage is low
41- Cam sensor failure. cylinder select error. Electronic spark timing circuit-open or shorted to ground during engine run. Ignition system fault-loss of 1x reference pulse signal
46- Power steering switch failure. VATS failure
51- Computer problem; faulty,wrong or incorrectly installed PROM circuit; or ECM/PCM failure.
53- system voltage too high (over 17.7 volts to ECM) or EGR system fault or alternater voltage not normal or Vehicle Anti-theft system fault.
so im not sure how many of these codes are old and were before i started trying to find this problem. I bought this car not running.
I was wondering how to erase these codes so i could run a fresh scan to wee which codes are still there.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
so here are the codes im getting:
13- oxygen sensor fault-signal too low/open left oxygen sensor circuit
15- coolant temp sensor or circuit fault- signal voltage too high
21- tps sensor- signal voltage is high
23- IAT sensor low/ MAT sensor or intake air low temp/ TPS error
25- MAT or IAT temp high. Spark referance (24x) signal low voltage
32- Electronic vacuum regulator valve error. exhaust gas recirculation valve diagnostic switch-closed during engine start up or open when EGR flow requested by ECM 3. MAP sensor signal voltage is low
41- Cam sensor failure. cylinder select error. Electronic spark timing circuit-open or shorted to ground during engine run. Ignition system fault-loss of 1x reference pulse signal
46- Power steering switch failure. VATS failure
51- Computer problem; faulty,wrong or incorrectly installed PROM circuit; or ECM/PCM failure.
53- system voltage too high (over 17.7 volts to ECM) or EGR system fault or alternater voltage not normal or Vehicle Anti-theft system fault.
so im not sure how many of these codes are old and were before i started trying to find this problem. I bought this car not running.
I was wondering how to erase these codes so i could run a fresh scan to wee which codes are still there.
13- oxygen sensor fault-signal too low/open left oxygen sensor circuit
15- coolant temp sensor or circuit fault- signal voltage too high
21- tps sensor- signal voltage is high
23- IAT sensor low/ MAT sensor or intake air low temp/ TPS error
25- MAT or IAT temp high. Spark referance (24x) signal low voltage
32- Electronic vacuum regulator valve error. exhaust gas recirculation valve diagnostic switch-closed during engine start up or open when EGR flow requested by ECM 3. MAP sensor signal voltage is low
41- Cam sensor failure. cylinder select error. Electronic spark timing circuit-open or shorted to ground during engine run. Ignition system fault-loss of 1x reference pulse signal
46- Power steering switch failure. VATS failure
51- Computer problem; faulty,wrong or incorrectly installed PROM circuit; or ECM/PCM failure.
53- system voltage too high (over 17.7 volts to ECM) or EGR system fault or alternater voltage not normal or Vehicle Anti-theft system fault.
so im not sure how many of these codes are old and were before i started trying to find this problem. I bought this car not running.
I was wondering how to erase these codes so i could run a fresh scan to wee which codes are still there.
http://www.chevythunder.com/Flow%20c...roubleshooting Flow Chart Pages
The 90 has no cam sensor.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
open the ecm and find the blue memcal that's 3 1/2" x 1" inside the blue covers window is the sticker.
http://www.ebay.com/itm/90-91-CORVETTE-88-93-CUTLASS-GRAND-PRIX-90-93-LUMINA-88-92-REGAL-ECU-1227727-/221003578378?pt=Motors_Car_Truck_Parts_Accessories&hash=item3374d6fc0a&vxp=mtrSee the cover is off in the picture.
http://www.ebay.com/itm/90-91-CORVETTE-88-93-CUTLASS-GRAND-PRIX-90-93-LUMINA-88-92-REGAL-ECU-1227727-/221003578378?pt=Motors_Car_Truck_Parts_Accessories&hash=item3374d6fc0a&vxp=mtrSee the cover is off in the picture.
Melting Slicks
Joined: May 2010
Posts: 2,082
Likes: 3
From: Conowingo Maryland
disconnect the battery for a few seconds. then reconnect. then try to start car then see what codes you have. diconecting the battery should clear the codes and only the present codes should appear
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
You can see your BCC here:
http://www.chevythunder.com/prom_bcc_1990.htm
Start with ecm, and then the memcal. I can help you with the memcal if you like. see my website in my username. First, do as another suggested and clear codes to see if you pull the same a second time.
http://www.chevythunder.com/prom_bcc_1990.htm
Start with ecm, and then the memcal. I can help you with the memcal if you like. see my website in my username. First, do as another suggested and clear codes to see if you pull the same a second time.
Thread Starter
Intermediate
Joined: Nov 2013
Posts: 39
Likes: 0
From: Camrose Alberta
I cleared the codes and got the same ones back again.
So you think I should start with the ECM? How much should I expect to pay for one? and is this a dealer item or should i get one off ebay?
So you think I should start with the ECM? How much should I expect to pay for one? and is this a dealer item or should i get one off ebay?
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Those error codes don't seem to be correct for your car (for example, Corvettes don't have a power steering pressure switch, code 46). See this list:
http://forums.corvetteforum.com/1576116036-post35.html
If you really have that many codes (you didn't say how you retrieved them), then either you're using a scanner that is not configured correctly for your car or you have bad grounds.
http://forums.corvetteforum.com/1576116036-post35.html
If you really have that many codes (you didn't say how you retrieved them), then either you're using a scanner that is not configured correctly for your car or you have bad grounds.
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
You have won the jackpot prize ; DTC 41
Loss of serial data Comms from the CCM to the ECM which includes the above VATS signal
Could be a faulty ECM or CCM , the wiring in between them or a bad ground
http://www.digitalcorvettes.com/foru...5&postcount=17
VATS shuts of the injectors by stopping them firing ( and also the starter to prevent theft. )
One or both parts of VATS can fail independent of each other
Loss of serial data Comms from the CCM to the ECM which includes the above VATS signal
Could be a faulty ECM or CCM , the wiring in between them or a bad ground
http://www.digitalcorvettes.com/foru...5&postcount=17
One or both parts of VATS can fail independent of each other
Last edited by vetteoz; Nov 6, 2013 at 02:43 AM.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
As cheap as the 1227727's are on flea bay it would be worth it too pick one up and have an extra. hook it up with your memcal, and if the same condition exists you know it's not the ecm. if you'd like, you may send me your memcal, and I can test it for you. as others have said, you're just pulling too many codes for it not too be a ecm, or memcal issue. Personally, I wouldn't think the CCM would cause this issue as vettoz suggested, but he's a smart guy.