Flashing SES light - no codes
07-18-2010, 05:25 PM
#1
Teching In
Thread Starter
Flashing SES light - no codes Sup guys.
I searched my butt off, and have been troubleshooting with what has been said in other threads. I can't find a situation which is exactly like mine...
Have a 99 firehawk. I am getting slight hesitation and flashing SES light when I drive above 2k rpm. The car is driveable, and isn't seriously bucking or anything. The light will stop flashing when I slow down to about 10mph. Its wierd because I can be going down hill, throw the car into neutral where the rpm will drop to ~500, and the light will keep flashing. I took it in to a shop, and they checked with a code reader, but its not storing any codes.
The car has a P-1SC with a stock pulley. I had a blown diaphram in the bypass valve for about the last year and a half. I replaced the valve about a month ago which fixed the boost problem. I would possibly blame the valve, but the car would hesitate intermitantly about a month before that. The car just has the larger injectors and TR6 plugs as part of the SC kits. No other internal engine work has been done.
I have cleaned the MAF with MAF cleaner, cleaned the TB. Plugs/wires were changed a year ago. However, I am pulling them all off to check. I did the drivers side last week, and am going out to check the more fun passenger side right now. I had a small exhaust leak after the cat which I fixed. Then aside from me finding anything with the plugs/wires, people have mentioned injectors or coil packs.
Has anyone seen or heard of a flashing SES light, but no codes?
I searched my butt off, and have been troubleshooting with what has been said in other threads. I can't find a situation which is exactly like mine...
Have a 99 firehawk. I am getting slight hesitation and flashing SES light when I drive above 2k rpm. The car is driveable, and isn't seriously bucking or anything. The light will stop flashing when I slow down to about 10mph. Its wierd because I can be going down hill, throw the car into neutral where the rpm will drop to ~500, and the light will keep flashing. I took it in to a shop, and they checked with a code reader, but its not storing any codes.
The car has a P-1SC with a stock pulley. I had a blown diaphram in the bypass valve for about the last year and a half. I replaced the valve about a month ago which fixed the boost problem. I would possibly blame the valve, but the car would hesitate intermitantly about a month before that. The car just has the larger injectors and TR6 plugs as part of the SC kits. No other internal engine work has been done.
I have cleaned the MAF with MAF cleaner, cleaned the TB. Plugs/wires were changed a year ago. However, I am pulling them all off to check. I did the drivers side last week, and am going out to check the more fun passenger side right now. I had a small exhaust leak after the cat which I fixed. Then aside from me finding anything with the plugs/wires, people have mentioned injectors or coil packs.
Has anyone seen or heard of a flashing SES light, but no codes?
07-19-2010, 01:19 PM
#3
So let me understand you have used a scanner to see if there are codes, what scanner was used?
I myself use a older Predetor hand held scanner and ALL PCM's regardless if to throws a SES will show when there is a DTC tripped.
Reason why I mention is that a Flashing SES light signifies MISFIRE.
Could be due to a number of thinks, a fuel issue, or a spark issue. CHeck plug wires and actual plugs are important.
BUT the thing is that you need to run the car hard and immediately shut down in a safe place and start pulling, do not allow plugs to idle and get coated, wires should physically be checked and FP tested with a guage and a load on the car.
I myself use a older Predetor hand held scanner and ALL PCM's regardless if to throws a SES will show when there is a DTC tripped.
Reason why I mention is that a Flashing SES light signifies MISFIRE.
Could be due to a number of thinks, a fuel issue, or a spark issue. CHeck plug wires and actual plugs are important.
BUT the thing is that you need to run the car hard and immediately shut down in a safe place and start pulling, do not allow plugs to idle and get coated, wires should physically be checked and FP tested with a guage and a load on the car.
07-19-2010, 06:27 PM
#4
Sounds like it could be a false mis-fire issue. Check out this article and have the dealer or a garage with a scan tool run the re-learn procedure:
http://www.seattleautomotive.com/ckpdoc.htm
I had to do this when the new engine was installed years ago.
http://www.seattleautomotive.com/ckpdoc.htm
I had to do this when the new engine was installed years ago.
