Could this be a bad distributer cap?
Car wants to stall in gear (600 rpm), and I'm 40 miles from home now...
Location: FL
Posts: 948
My VIN: Early
Could this be a bad distributer cap?
Car wants to stall in gear (600 rpm), and I'm 40 miles from home now...
Early 81 5spd conversion- DMCH Ground Effects, Double Din, Custom Instrument Cluster, QA1 Suspension, 3.0 PRV with MS3
Do you have a stock ignition? I ask because I had a GM unit that needed a capacitor and it made a skip like that.
Dave M vin 03572
http://dm-eng.weebly.com/
Location: FL
Posts: 948
My VIN: Early
I have the gm unit with the capacitor you sent me...
With further testing it actually seems like your idle ecu is malfunctioning. AC will no longer bump idle and the clicking is actually coming from the vacuum solenoid.
Idle is randomly jumping now too, but if I unplug the ecu, it just stays low.
Early 81 5spd conversion- DMCH Ground Effects, Double Din, Custom Instrument Cluster, QA1 Suspension, 3.0 PRV with MS3
Dave M vin 03572
http://dm-eng.weebly.com/
Weird noise!
In the video, were you pinching off the line that goes to the distributor (it should be the furthest port from the electrical plug on the vacuum solenoid, iirc), or was it the feed line to the vacuum solenoid? The reason I ask is
I don't think pinching either one should have changed anything since the vacuum solenoid should be shut and not supplying vacuum to the distributor at idle.
Are you sure it is the vacuum solenoid causing the noise...ie not something else causing it to flutter...or maybe the vacuum advance diaphragm has a hole in it...or the plate loose?
Just throwing out ideas...
Location: FL
Posts: 948
My VIN: Early
Went ahead and installed Dave's new ecu. Unfortunately, it did not fix my issue. I was at a loss.
However tonight, while I was fixing a bad led tail light, I had my ignition set to run for about 30 minutes. In that time, I could hear the damn clicking noise! Turns out the clicking is coming from the idle speed motor, but also every time the idle motor clicks, the vacuum solenoid clicks open. I confirmed this by unplugging and repplugging the solenoid while the issue was occurring.
So what could be the issue? Is it a sticking idle speed motor that causes Dave's idle ecu to reset?
Here's a quick video while the anomaly occurred. Also, after a key cycle, it didn't happen again....
Early 81 5spd conversion- DMCH Ground Effects, Double Din, Custom Instrument Cluster, QA1 Suspension, 3.0 PRV with MS3