1994 misfiring
Thread Starter
Instructor
Joined: Nov 2004
Posts: 230
Likes: 1
1994 misfiring
Last week the top radiator hose clamp broke, sprayed the Opti and the Opti died.
Replaced the clamp, sprayed the Opti with WD-40 and back on the road. Yay!!
About 120,000 miles, plugs, wires and Opti about 6,000
Today I have a misfire at idle and all rpms.
A couple times I have started the car and rpms are high (1200) but put it in gear and hold the brake and it comes back down to around 600. I might go up while driving sometimes also.
Now it is misfiring, I checked the exhaust temp at each cylinder with the pyro meter. drivers side front to back 390,500,390
passenger side are all around 400.
Seems odd the differences.
Checked codes and got H37 and H72
Other problems are that I believe the heater core is going bad, I'm starting to smell it.
The speed sensor on the transmission is leaking fluid.
So the H72 is the speed sensor I believe.
The H37 I'm not sure.
My questions are: how does a "sealed" Opti (MSD)get wet?
Why the different readings on the exhaust?
What causes the idle to go up?
What could be causing the misfire?
Why am I not driving a 2013 427 convertible????
Thanks for any input
Rick
Replaced the clamp, sprayed the Opti with WD-40 and back on the road. Yay!!
About 120,000 miles, plugs, wires and Opti about 6,000
Today I have a misfire at idle and all rpms.
A couple times I have started the car and rpms are high (1200) but put it in gear and hold the brake and it comes back down to around 600. I might go up while driving sometimes also.
Now it is misfiring, I checked the exhaust temp at each cylinder with the pyro meter. drivers side front to back 390,500,390
passenger side are all around 400.
Seems odd the differences.
Checked codes and got H37 and H72
Other problems are that I believe the heater core is going bad, I'm starting to smell it.
The speed sensor on the transmission is leaking fluid.
So the H72 is the speed sensor I believe.
The H37 I'm not sure.
My questions are: how does a "sealed" Opti (MSD)get wet?
Why the different readings on the exhaust?
What causes the idle to go up?
What could be causing the misfire?
Why am I not driving a 2013 427 convertible????
Thanks for any input
Rick
Thread Starter
Instructor
Joined: Nov 2004
Posts: 230
Likes: 1
Solved misfire
Last week the top radiator hose clamp broke, sprayed the Opti and the Opti died.
Replaced the clamp, sprayed the Opti with WD-40 and back on the road. Yay!!
About 120,000 miles, plugs, wires and Opti about 6,000
Today I have a misfire at idle and all rpms.
A couple times I have started the car and rpms are high (1200) but put it in gear and hold the brake and it comes back down to around 600. I might go up while driving sometimes also.
Now it is misfiring, I checked the exhaust temp at each cylinder with the pyro meter. drivers side front to back 390,500,390
passenger side are all around 400.
Seems odd the differences.
Checked codes and got H37 and H72
Other problems are that I believe the heater core is going bad, I'm starting to smell it.
The speed sensor on the transmission is leaking fluid.
So the H72 is the speed sensor I believe.
The H37 I'm not sure.
My questions are: how does a "sealed" Opti (MSD)get wet?
Why the different readings on the exhaust?
What causes the idle to go up?
What could be causing the misfire?
Why am I not driving a 2013 427 convertible????
Thanks for any input
Rick
Replaced the clamp, sprayed the Opti with WD-40 and back on the road. Yay!!
About 120,000 miles, plugs, wires and Opti about 6,000
Today I have a misfire at idle and all rpms.
A couple times I have started the car and rpms are high (1200) but put it in gear and hold the brake and it comes back down to around 600. I might go up while driving sometimes also.
Now it is misfiring, I checked the exhaust temp at each cylinder with the pyro meter. drivers side front to back 390,500,390
passenger side are all around 400.
Seems odd the differences.
Checked codes and got H37 and H72
Other problems are that I believe the heater core is going bad, I'm starting to smell it.
The speed sensor on the transmission is leaking fluid.
So the H72 is the speed sensor I believe.
The H37 I'm not sure.
My questions are: how does a "sealed" Opti (MSD)get wet?
Why the different readings on the exhaust?
What causes the idle to go up?
What could be causing the misfire?
Why am I not driving a 2013 427 convertible????
Thanks for any input
Rick
Thought I would start by changing the speed sensor but couldn't get at it with the corvette jack.
So I thought I would start pulling spark plug wires to isolate the problem.
Got lucky, The Angels were with me, turns out one of the wires had fallen off.
Just a reminder to always ask your Angels for help as they cannot help without your asking!!
I've already asked them for help with the heater core, I think I'm going to need em!!!
Happy driving
Rick
