Tach jumping & Car Breaking Up

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striansem

New Member

Jul 19, 2008

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0

Jul 19, 2008

#1

• Jul 19, 2008

• #1

When I drive my car the tach jumps from 2k rpm to 3k rpm and breaks up and bucks during normal acceleration. It also does it even worst when under full accceleration. I have checked the fuel pressure, changed the fuel filter and looked for arking under the hood. I am very frustrated, does anyone have any ideas.
Thank You

 

desertcox05

New Member

Oct 3, 2007

379

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south atlanta

Jul 19, 2008

#2

• Jul 19, 2008

• #2

pull your dizzy cap off and look for metal shavings in the bottom. if you do then the pip is going out and you'll have to replace it or and easier option would be to replace the distributor

 

S

striansem

New Member

Jul 19, 2008

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Jul 20, 2008

#3

• Jul 20, 2008

• #3

Thanks, I will check that out. If I come up negative do you have any other suggestions?

 

desertcox05

New Member

Oct 3, 2007

379

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south atlanta

Jul 20, 2008

#4

• Jul 20, 2008

• #4

it could be something as simple as a cap and rotor too. mine ran a lot better with a msd cap than a stock replacement

 

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striansem

New Member

Jul 19, 2008

5

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0

Jul 20, 2008

#5

• Jul 20, 2008

• #5

I put new cap, rotor and wires and car ran great. I did not see any metal shavings in the distributor.

 

stprorolla49

Active Member

Oct 9, 2004

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39

Fairfield, CT/North Jersey

Jul 20, 2008

#6

• Jul 20, 2008

• #6

Sounds like what happened to me when the stator on my distributor went. Also might want to run some fuel injector cleaner through it and change the fuel filter. Just a thought.

 

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striansem

New Member

Jul 19, 2008

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Jul 20, 2008

#7

• Jul 20, 2008

• #7

Have a fresh tank of gas and just replaced the fuel filter, I will test the and get back to you. Thanks

 

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striansem

New Member

Jul 19, 2008

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Jul 21, 2008

#8

• Jul 21, 2008

• #8

Pulled of the harness off the coil and the contacts were a little corroded. Clean them up and checked the resistance on the primary and secondary on the coil and they were in specs. Test drove the car and the tach did not jump but car broke up but not as bad. Installed the stock fuel pressure regulator and car ran much better and intermittingly broke up at high rpm. I am think that I may have some bad gas and will put some dry gas and fuel injection cleaner in and see what results I get. The car does not break up under normal driving conditions anymore.