Greg what was you're car doing before they installed the new module and coil? RICK
Too Much Voltage??
So I gave up and took my 65 in - ignition issues - changed out the module and coil, now it stumbles when I get on it and the tach jumps to 5500-6000 when the motor is really down at 1800-2000. Get off it and it's fine..I have a Mallory 91 series dizzy, with correct Mallory coil and ballast.
Took it in to pull the Mallory and drop in a GM dizzy unit.
So I call in to check and the mechanic says their is too much voltage .. Might be a feedback from the tach - but definitely more than 12 volts.
Hell be "plugging it in" tomorrow to trace the problem.
I've never heard of this - is this possible or is it a line I'm being fed?
All I know is just enough to get me in trouble - as the saying goes.
Thx
Greg
Took it in to pull the Mallory and drop in a GM dizzy unit.
So I call in to check and the mechanic says their is too much voltage .. Might be a feedback from the tach - but definitely more than 12 volts.
Hell be "plugging it in" tomorrow to trace the problem.
I've never heard of this - is this possible or is it a line I'm being fed?
All I know is just enough to get me in trouble - as the saying goes.
Thx
Greg
1 - 14 of 14 Posts
Hey Rick Once it got to temp, I'd pull to a stop and it would run real rough, like starving for fuel, go and try to feather it and it won die before giving it the gas. Then would not start again until cool 25-30 minutes.
Swapped the coil and module, installed ballast as what the specs called for... The dissy has an optic sensor in the module which I have not heard good things about. The 91 series is supposed to be race only - not street use- it came with the car. I do not spin my motor that fast - just the occasional burn out etc..
But at this point who knows ... Maybe I messed something under the dash when I stripped it and painted it. I did pull about 15 feet of loose wire, misc lines etc.
I had just never heard of too much voltage before...
Greg
Swapped the coil and module, installed ballast as what the specs called for... The dissy has an optic sensor in the module which I have not heard good things about. The 91 series is supposed to be race only - not street use- it came with the car. I do not spin my motor that fast - just the occasional burn out etc..
But at this point who knows ... Maybe I messed something under the dash when I stripped it and painted it. I did pull about 15 feet of loose wire, misc lines etc.
I had just never heard of too much voltage before...
Greg
too much voltage can be produced by a faulty voltage regulator - internal or external version - depending on what type is installed in your car.
Frank
Frank
Update - the shop finally took a look and claimed to find a bad ground for the ignition module. Cleaned up the ground and the connections and declared it fixed.
So my son, who is on leave, took it out last night - had to call me as the car died again. ¥€£¥€%#.... He was fine - fit to enjoy it for 1/2 an hour and was headed back.
So I'm back to square one. Tested the alternator at the "auto parts store" passed with a 63 amp rating- probably too low as I have an elec fan that pulls 30 amp on its own.
So I'm thinking about pulling the Mallory unilite 91 series dizzy and coil and alternator ... Suggestions ...
Only street use with the occasional spirited driving ...
I'm almost at the point of selling my car I'm getting so fed up with issues....
Greg
So my son, who is on leave, took it out last night - had to call me as the car died again. ¥€£¥€%#.... He was fine - fit to enjoy it for 1/2 an hour and was headed back.
So I'm back to square one. Tested the alternator at the "auto parts store" passed with a 63 amp rating- probably too low as I have an elec fan that pulls 30 amp on its own.
So I'm thinking about pulling the Mallory unilite 91 series dizzy and coil and alternator ... Suggestions ...
Only street use with the occasional spirited driving ...
I'm almost at the point of selling my car I'm getting so fed up with issues....
Greg
Sounds like module is getting over heated, swap in a hei diz and see if it clears up.
I had a Mallory at one point. Nothing but issues with that P.O.S. thrashed it and went to the junk yard, got an HEI and no issues with it. I swear that thing was TOO sensitive.Sounds like module is getting over heated, swap in a hei diz and see if it clears up.
Sounds like module is getting over heated, swap in a hei diz and see if it clears up.
Any suggested one's to look for.. I know next to nothing on dizzy's - The mallory is mechanical - I've read a little on the tuning of a dizzy by swapping springs etc.. Links would be great.I had a Mallory at one point. Nothing but issues with that P.O.S. thrashed it and went to the junk yard, got an HEI and no issues with it. I swear that thing was TOO sensitive.
It's a 355 with a 680 Quick fuel SS vacum 2ndary carb, edelbrock performer intake a mild cam, edelbrock heads 2.02 / 1.65,
any help would be great.
Greg
This should do the trick Greg Make sure you have enough room between the firewall and dizzy to fit an HEI. RICK
http://www.summitracing.com/parts/SUM-850001R/
http://www.summitracing.com/parts/SUM-850001R/
Getting to much voltage it has to be the regulator. Is you alternator internally regulated or external. Either or. Swap out the alternator with another and try or get a new external voltage regulator. I dealt with to much voltage one time and it was my external voltage regulator and my battery started swelling. You mentioned that you car has trouble when you jump on it but is fine at idle. I know you mentioned you swapped out the coil already. If it's a Mallory I would say coil pickup. I had a Comp 9 that did the same thing. Was fine until I jumped on it and then it would cut out. So if it's voltage it's the regulator either internal or external regulator. If you fix this and you still have the same problem when you jump on it it's the coil pickup providing you have already swapped the module and coil. Hope the best.
Forgot to say by it dyeing and you having to wait for it to cool down before it will start again is tall tale sign of either the coil or coil pickup. You already swapped out the coil and module so that leaves you the coil pickup. I think the charging issue is somewhat unrelated in all kindness. My car drove over 250 miles on that faulty external voltage regulator and by the time my brother parked it my battery was literally like a balloon and sizzling but it kept running even though it was getting well over 12 volts. He didn't notice until he got it home and he heard sizzling under the hood and the battery was about to blow.
At this point I think the alternator might be causing issues, plus I installed a tranny cooler and the motor is running hotter - which I also think is negatively affecting the ingnition module. The alternator I have was tested at 63 amps and I am running a high volume electric fan - so I think I am taxing the alternator a bit..Getting to much voltage it has to be the regulator. Is you alternator internally regulated or external. Either or. Swap out the alternator with another and try or get a new external voltage regulator. I dealt with to much voltage one time and it was my external voltage regulator and my battery started swelling. You mentioned that you car has trouble when you jump on it but is fine at idle. I know you mentioned you swapped out the coil already. If it's a Mallory I would say coil pickup. I had a Comp 9 that did the same thing. Was fine until I jumped on it and then it would cut out. So if it's voltage it's the regulator either internal or external regulator. If you fix this and you still have the same problem when you jump on it it's the coil pickup providing you have already swapped the module and coil. Hope the best.
My plan is to swap out the coil and Mallory Dizzy with a GM Dizzy(integrated with the coil in the cap) and install a 100 amp alternator - hopefully this will resolve my issues..
Wish me luck
Optical pickups are sensitive and not reliable. I run a Mallory but it is a magnetic pickup distributor. Been in my car since 95. I would go with your plan of doing an HEI.
If you decide on a smaller distributor I would suggest something with a magnetic pickup.
If you decide on a smaller distributor I would suggest something with a magnetic pickup.
Good idea. New alternator should resolve your voltage issues and a new HEI will resolve your ignition issues. HEI distributors are great everything is in 1 unit and easy to work on. Bet you will be up and running good as soon as you have made these changes, The best and let everyone know.At this point I think the alternator might be causing issues, plus I installed a tranny cooler and the motor is running hotter - which I also think is negatively affecting the ingnition module. The alternator I have was tested at 63 amps and I am running a high volume electric fan - so I think I am taxing the alternator a bit..
My plan is to swap out the coil and Mallory Dizzy with a GM Dizzy(integrated with the coil in the cap) and install a 100 amp alternator - hopefully this will resolve my issues..
Wish me luck
1 - 14 of 14 Posts
- This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Chevy Nova Forum
A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Recommended Communities
