I was out racing at tire rack today. I was getting ready to launch the car, looking down to see what my rpms were. The tach. for no reason was going from 1-4000 rpms. you could tell by the sound that the motor was only going about 1,000 the tach was just going crazy and was wrong. 1/2 way in my lap the car dies on me. I got to start it again and it idles really ruff. evey time the rpms drop there is a switching noise coming from the inside fuse box. It sounds like a relay switching back and forth. then it dies about 8 sec later. about every other try i give it i see the Speedometer run to about 60 mph what could this be. is it my ecu? And now here i am with my car towed home. Please help. if it is my ecu can i take it out to be tested? or dose it have to be in the car?

 

could it be my rpm wire grounding out?

 

any one>?

 

well i did some testing and on my msd coild both the "+" and the "-" When the ignition is on, they both read 12v is that right?

 

that really really REALLY sounds like a wire grounding out somewhere, trust me on this one, i had half of my harness grounds jumping to the transmission and the RPM's went back and forth and back and forth, and then whenever i touched the gas it dropped to 0 and shut off.... check your grounds mang

 

Yeah sounds like wiring grounding out or sensor

 

what about the coil tho could that be bad? not it dosnt even want to start

 

bump

 

if you want to test your ecu, simply unplug it, and give it to another honda/acura owner to try. Depending on your year and their year vehicle though.

 

if a wire is grounding out it's not going to start... period

check every ground and on the way to checking those grounds make sure there aren't any other exposed wires

 

if you give me a deposit or collateral i will shoot you out my ls ecu