Tach/engine jumping up and down... help please |
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Tach/engine jumping up and down... help please |
tod914 |
Jul 8 2007, 11:20 AM
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#1
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Advanced Member Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170 |
Just started happening. The car is a 75 2.0 with fuel injection. It has a pertronix ignition. The problem is, it seems to be jumping up and down in the rmp's and idles very low. Idle adjustment didnt seem to help. I checked all the grounds and contacts including the tranny strap. I swapped out the voltage reg and throttle switch and the problem still persisted.
Computer problem? Timeing problem? timeing was done last year, fi trigger points a few years old. Pertronix problem? its about 4 years old Bad coil? 4 years old Grounding issue? has new fi harness from bowsby - 2 years old Head temp sensor? its about 2 years old. What would you all suggest. Thanks for the help, Tod |
McMark |
Jul 8 2007, 09:58 PM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Also, make sure your coil isn't loose and grounding to the engine tin. (IMG:style_emoticons/default/wink.gif) I've had that happen to me and it's the first thing that popped in my mind when I opened this thread.
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ConeDodger |
Jul 8 2007, 10:58 PM
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#3
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Apex killer! Group: Members Posts: 23,612 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California |
Also, make sure your coil isn't loose and grounding to the engine tin. (IMG:style_emoticons/default/wink.gif) I've had that happen to me and it's the first thing that popped in my mind when I opened this thread. I agree! Especially the 75 -76 cars. If your tin on the passenger side is ripped and you cannot really torque down the coil, it can turn and ground on the tin. The tach will jump around and the car will run like (IMG:style_emoticons/default/stromberg.gif) . Then it will kill when completely grounded... |
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