Question about Chevrolet S 10
I changed the motor type from original body type so trying to get rid of wireing from electronic connection without interfiering with rest of wireing system for truck?
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Posted on Jan 02, 2017
Hey , just take the positive wire from the coil you are removing and feed it to the + terminal on the HEI dist. cap.the other terminal under there is for your tachometer. If you are mounting a master kill switch in the bumper for drag racing- attatch the kill wire to the tach terminal also.
Thats it you just plug the three wire pigtail from the dist. base(pickup) to the cap and you are off.
Remember firing order is 18436572 in a clockwise direction. to find #1 remove #1 plug and have someone"bump" the engine over while holding your finger over the hole-carefull. then line up the slotted mark on the crank pulley with the big notch on the timing indicator. Good luck
Posted on Aug 31, 2008
SOURCE: HEI Coil is burning out
If the Electrical system is grounding out, particularly the hot lead to the coil. then you will fry coils. Check your Positive leads at the fuse box for continuity to ground. 1st check the ignition wire i.e. red wire going to your coil. Disconnect the ignition wire from the coil or distributor (depending where your coil is located). If it has continuity to ground, then go to your fuse box and pull out all your fuses and test each terminal for continuity to ground until you find which circuit is grounding out and polluting the rest of the positive circuitry. If it is only the ignition hot wire then you know that is where the problem is. If it is coming into the fuse block from another positive source, isolate that source by not allowing it to come into contact with + current.
Posted on Oct 31, 2008
SOURCE: I have a 1992 gmc
Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system.
During cranking, the timing is controlled by the ignition module while the ECM monitors the engine speed. When the engine speed exceeds 400 RPM, the ECM sends a BYPASS signal to the ignition module which switches the timing to ECM control. The ECM calculates what the timing should be then "tells" the ignition module via the EST circuit.
An open or ground in the EST circuit will stall the engine and set a Code 42. The engine can be re-started but it will run on ignition module timing.
The conditions for setting this code are:
- or -
Typical causes for this code include:
1) BYPASS line is open or grounded
2) EST line is open or grounded
3) PROM or CALPACK not seated properly in the ECM
4) Poor connections between ignition module and ECM
5) Poor routing of EST harness and/or poor quality ignition wires (EMI induced electrical noise)
6) Faulty or incorrect ignition module
7) Faulty ECM
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Posted on Oct 10, 2010
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