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1989 pickup: v6..fire during accelaration idles fine..coil..rotor…

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1989 pickup v6 starts to...
1989 pickup v6 starts to miss fire during accelaration idles fine. I have changed the following; fulefilter, coil, dist.cap and rotor. Iam thinking about changing the igniter?
Submitted: 8 years ago.Category: Toyota
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Answered in 10 hours by:
6/24/2010
Toyota Mechanic: Jim Barlogio, ASE Certified Technician replied 8 years ago
Jim Barlogio
Jim Barlogio, ASE Certified Technician
Category: Toyota
Satisfied Customers: 1,257
Experience: 38 Years exp working on foreign and domestic
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Welcome to Just Answer,

Did you replace the spark plug wires? If not you should and be sure to use only name brand parts, Napa Belden, Toyota, Bosch etc. Let me know if this solves your problem.

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Customer reply replied 8 years ago
I tryed changeing the spark plug wires and I still have the same problem. What do we do next?
Toyota Mechanic: Jim Barlogio, ASE Certified Technician replied 8 years ago
HI,
So you have new wires in place correct? Usually a misfire on accel is a plug or wire issue. Then these are the next steps or possible problems
1. Run a compression test on all the cylinders
2. Scan for any codes: CHECK ENGINE LIGHT ON
3. Mass Air Flow Meter
4. Dist pick up or rpm sensor giving false signals to the PCM
5. Cracked intake air boot
6. Throttle position sensor
7. Valve train problem. Check Valve clearance

Some items are easy to check others require more experience which you may need the help of a shop.
Let me know where you are on this project.

Jim


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Customer reply replied 8 years ago
Relist: I still need help.
1989 toyota pickup V6,4x4. runs great,but when the breaks are aplyed the RPMs go up and down. I changed the break switch,and relay. I disconected the wires from the break switch, and then I pressed on the breaks. the RPMs did not spike up and down,but now I have no break lights.
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