 Tach/engine jumping up and down... help please |
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| tod914 |
 Jul 8 2007, 11:20 AM
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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 |
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| tod914 |
Jul 16 2007, 12:45 AM
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Advanced Member Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170 |
swapped out the distributor with one the orginal one that i put a new contact plate in; as well as points and a condensor. new cap and rotor, and replaced the bosch wires with the set of firebraids i had. set the dwell and purchased a new timing light from sears (dead out of the box). so the dwell is set and the issues seemed to of disapeared. timed it sort by ear if there is such a thing so its running. tomorrow ill replace the timing light and time the motor (not by ear). seems the pertronix was the culprit. was about 4-5 years old. I'll stick with points from this point foward (IMG:style_emoticons/default/smile.gif). anyway, wanted to thankyou all for your expertise and timely responces. i'll let you all know how it runs once i take it for a spin tomorrow.
the voltage at the coil is 11.6 while at the battery terminals it's 12.8 with the ignition key turned on. so i assume thats good numbers? Rob btw, how do you like the 240Z? |
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Posts in this topic
tod914 Tach/engine jumping up and down... help please Jul 8 2007, 11:20 AM
9146986 I'd guess something in the ignition. If it ha... Jul 8 2007, 11:37 AM tod914 ok thanks, i'll try that. it's ok at star... Jul 8 2007, 11:55 AM Michael N Have you checked all your fuses? Jul 8 2007, 12:10 PM So.Cal.914 Check for a slightly tight valve, as it warms up t... Jul 8 2007, 12:20 PM shaggy when i still had points mine did that same thing.
... Jul 8 2007, 01:00 PM shaggy you also might wanna check that the bearings/bushi... Jul 8 2007, 01:02 PM tod914 Ok guys thanks for the tips.. I'll order some ... Jul 8 2007, 07:10 PM McMark Also, make sure your coil isn't loose and grou... Jul 8 2007, 09:58 PM
ConeDodger
Also, make sure your coil isn't loose and gro... Jul 8 2007, 10:58 PM tod914 the coil has the rubber insulator pad around it an... Jul 8 2007, 11:38 PM ConeDodger
the coil has the rubber insulator pad around it a... Jul 9 2007, 12:43 AM |
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