The ignition module together with the entire distributor is less than 4000miles old.
Doesn't matter.
If there is no tach movement when cranking and the tach signal goes nuts right before it dies... I wouldn't look for anything else before getting a new a properly installed (heatsink compound, not dielectric grease, used) ACDelco ignition control module.
We'll it started just fine after replacing all the connectors. I'm wondering if a bad connection on the coil wire would cause the same symptoms.. Since it goes from the Ignition module to the coil.
I have to admit, I made the naive assumption that the assembly was built correctly and they did use some good heat sink compound.
On my other cars I use arctic silver now. Probably overkill, but why not?
So what makes the rpm needle peak upwards when driving under load or Javier throttle?
What are usual symptoms of MAP sensor failure?
Of TPS sensor failure?
[This message has been edited by Austrian Import (edited 07-22-2013).]
Oh, another thing I noticed that through the course odnthe last year my car gets 16.7mpg-19.9mpg. About this time a year ago I got 25mpg-30mpg. What the hell is wrong with my car?
pull tach filter when HEI has problems... Bad filter can cause all kinds of weirdness
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
I'll unplug it and see what happens. Still doesn't explain the rest of the symptoms. (Jerking in sync with with the bouncing. - problem going away when replugging the filter. Lack of power, terrible gas mileage, etc.)
Not the tach sensor. Unplugged it, same symptoms of car engine cutting out. Usually around the 4k rpm mark. (or by sound when the tach filter is unplugged)
Originally posted by Austrian Import: same symptoms of car engine cutting out. Usually around the 4k rpm mark.
Definitely pull the ICM and have it tested...the ICM has low and high RPM parts in it and can burn up only one portion....4k is about where it switches. I have had several that ran great right up to about 4k, then it was like I hit a rev limiter.
Originally posted by CowsPatoot: Definitely pull the ICM and have it tested...the ICM has low and high RPM parts in it and can burn up only one portion....4k is about where it switches. I have had several that ran great right up to about 4k, then it was like I hit a rev limiter.
Good to know. Kinda scary though as the ICM is less than 7k miles old and was replaced as an assembly with the distributor.
Good to know. Kinda scary though as the ICM is less than 7k miles old and was replaced as an assembly with the distributor.
Thats your problem right there! The ICMs that come with aftermarket distributors are garbage. You need to get an AC delco ICM. The problem is that it gets very hot in that area and burns up the modules. The AC delco ICMs are built to withstand the heat. I replaced my distributor and the ICM that came with it failed after 2,000 miles! Same symptoms as you no tach during cranking.