Ignition timing problem after tune up 3vze
08-08-2012, 06:23 PM
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Ignition timing problem after tune up 3vze
Could my dizzy be off a tooth and still have been running with good power for a truck that got no maintenance for over a year?
Replaced the plugs, wires, cap, rotor and coil last week. Two, possibly even three spark plugs were fouled and not doing didilly squat, which fixed a lot of my rich running smell
My 4runner then sounded a lot better, and more powerful at idle, but extremely lacked power on acceleration. No backfire or pinging though. Checked my timing to find i was up underneath the damn hose/belts so probably between 25 to 40* BTDC. Retarding the timing to the maximum (as far counter clockwise) possible, left me with the high teens to mid twenties, depending on rpm and mixture screw. It also jumps about two to three degrees.
Took it out and turned the rotor retarded it, clockwise one tooth. And i'm confident that it was only ONE tooth... Then after letting it idle i could only get to a maximum of 10 BTDC. Flipped it back, and now it will set to 15 BTDC, so it seems to me that my timing is not allowing me to enter the 10-15 degree threshold, and now I'm back to square one. what could this indicate?
an important thing i should mention is that when i jump the T and E terminals, nothing happens, no response whatsoever. Also, the ignition coil is aftermarket accel superstock coil the yellow one.
I feel like since i had no timing issues before the tune up, it must be one of my replacement parts, but after stumbling onto the timing issue, i'm just stumped
Timing belt off? Timing mark off? TPS?? I have not touched the TPS at all. Thanks guys
Replaced the plugs, wires, cap, rotor and coil last week. Two, possibly even three spark plugs were fouled and not doing didilly squat, which fixed a lot of my rich running smell
My 4runner then sounded a lot better, and more powerful at idle, but extremely lacked power on acceleration. No backfire or pinging though. Checked my timing to find i was up underneath the damn hose/belts so probably between 25 to 40* BTDC. Retarding the timing to the maximum (as far counter clockwise) possible, left me with the high teens to mid twenties, depending on rpm and mixture screw. It also jumps about two to three degrees.
Took it out and turned the rotor retarded it, clockwise one tooth. And i'm confident that it was only ONE tooth... Then after letting it idle i could only get to a maximum of 10 BTDC. Flipped it back, and now it will set to 15 BTDC, so it seems to me that my timing is not allowing me to enter the 10-15 degree threshold, and now I'm back to square one. what could this indicate?
an important thing i should mention is that when i jump the T and E terminals, nothing happens, no response whatsoever. Also, the ignition coil is aftermarket accel superstock coil the yellow one.
I feel like since i had no timing issues before the tune up, it must be one of my replacement parts, but after stumbling onto the timing issue, i'm just stumped
Timing belt off? Timing mark off? TPS?? I have not touched the TPS at all. Thanks guys
08-08-2012, 07:25 PM
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Make sure you're jumping TE1 & E1.
If no change (should be only 2-3 degrees at most), maybe a wiring harness issue. Jumping around timing is an indicator of a distributor problem, also.
Could also be an issue with the distributor that the PO "fixed" by moving the dizzy a tooth. All kinds of crazy stuff gets "fixed" by changing something other than the problem~
If no change (should be only 2-3 degrees at most), maybe a wiring harness issue. Jumping around timing is an indicator of a distributor problem, also.
Could also be an issue with the distributor that the PO "fixed" by moving the dizzy a tooth. All kinds of crazy stuff gets "fixed" by changing something other than the problem~
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