forgot to install timing chain
04-27-05, 08:19 PM
#1
forgot to install timing chain
ok, got 10 hours on my rebuilt... idled thru a tank of gas, varied between 1500 to 2500. reved it to 3000rpm, takes a while to rev up, rev up alot slower than the old motor, backfires like mad when i let off... no acv, erm, also got timing and tps set... but the weird thing is, the trailing and leading seems to fire at the same time.... but thats at 1300rpm... drove the car down the street, 1500 to 3000rpm feel very weak... i think it is because i forgot to install the timing chain?
04-27-05, 08:39 PM
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I think at some point leading and trailing both fire at the same time. At 1300 rpm youre timing should advance too... maybe they fire at the same time when the timing is advanced???
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04-27-05, 09:18 PM
#9
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Maybe he used some REALLY GOOD assembly lube,lol...
The leading and trailing should never fire at the same time in the same housing. The only way I could even envision this is to have all 4 CAS wires leading to the same pickup coil in the CAS...OR, a sparkplug wire is sitting right on top of the CAS signal wires, and somehow the shielding is screwed...
The leading and trailing should never fire at the same time in the same housing. The only way I could even envision this is to have all 4 CAS wires leading to the same pickup coil in the CAS...OR, a sparkplug wire is sitting right on top of the CAS signal wires, and somehow the shielding is screwed...
Last edited by WAYNE88N/A; 04-27-05 at 09:22 PM.
04-27-05, 09:23 PM
#10
04-27-05, 09:37 PM
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Originally Posted by WAYNE88N/A
Maybe he used some REALLY GOOD assembly lube,lol...
The leading and trailing should never fire at the same time in the same housing. The only way I could even envision this is to have all 4 CAS wires leading to the same pickup coil in the CAS...OR, a sparkplug wire is sitting right on top of the CAS signal wires, and somehow the shielding is screwed...
The leading and trailing should never fire at the same time in the same housing. The only way I could even envision this is to have all 4 CAS wires leading to the same pickup coil in the CAS...OR, a sparkplug wire is sitting right on top of the CAS signal wires, and somehow the shielding is screwed...
04-27-05, 09:48 PM
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Oh, I'm sure it's possible. The ECU doesn't care when it gets its CAS signals, it's going to use it to fire the ignitor. You could rig up a signal generator and get all 4 to fire at the same time if you wanted to. Not that any of us would want to do that 
04-27-05, 10:04 PM
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Originally Posted by WAYNE88N/A
Oh, I'm sure it's possible. The ECU doesn't care when it gets its CAS signals, it's going to use it to fire the ignitor. You could rig up a signal generator and get all 4 to fire at the same time if you wanted to. Not that any of us would want to do that
well I know you could, you could do it with a standalone. But thats not wat Im saying... stcok ecu= impossibble..
04-27-05, 10:26 PM
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If the L1 and T1 spark plugs are both connected to the leading coil, then the front rotors leading and trailing plugs (as shown with a timing light) will fire at the same time. That would leave L2 and T2 to be connected to the trailing coil, which is alternately firing a plug on the rear rotor. I don't know if he is checking the leading and trailing wires on both rotors, and I don't know if the engine will even run like this, but it is possible for the stock ECU to fire the leading and trailing plug (on 1 rotor) at the same time. If it is set up like this, it could explain his loss of power and responsiveness.
Last edited by Project84; 04-27-05 at 10:30 PM.
04-27-05, 10:34 PM
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Originally Posted by Project84
If the L1 and T1 spark plugs are both connected to the leading coil, then the front rotors leading and trailing plugs (as shown with a timing light) will fire at the same time. That would leave L2 and T2 to be connected to the trailing coil, which is alternately firing a plug on the rear rotor. I don't know if he is checking the leading and trailing wires on both rotors, and I don't know if the engine will even run like this, but it is possible for the stock ECU to fire the leading and trailing plug (on 1 rotor) at the same time. If it is set up like this, it could explain his loss of power and responsiveness.
04-27-05, 11:07 PM
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OK. The 1989 FSM, online and free to download. Page F1-77, Output Devices, bottom of the page where it says Igniter Trailing and Igniter Leading and the timing for them when the Engine is Cold.
Take a look. Both fire at BTDC 5*
Take a look. Both fire at BTDC 5*
04-27-05, 11:22 PM
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Originally Posted by HAILERS
OK. The 1989 FSM, online and free to download. Page F1-77, Output Devices, bottom of the page where it says Igniter Trailing and Igniter Leading and the timing for them when the Engine is Cold.
Take a look. Both fire at BTDC 5*
Take a look. Both fire at BTDC 5*
wtf guess I was wrong, retract my statement....
04-27-05, 11:34 PM
#24
Originally Posted by HAILERS
OK. The 1989 FSM, online and free to download. Page F1-77, Output Devices, bottom of the page where it says Igniter Trailing and Igniter Leading and the timing for them when the Engine is Cold.
Take a look. Both fire at BTDC 5*
Take a look. Both fire at BTDC 5*
ahhh! i see why now...
and pat... heh, i know....
04-27-05, 11:42 PM
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Originally Posted by HAILERS
OK. The 1989 FSM, online and free to download. Page F1-77, Output Devices, bottom of the page where it says Igniter Trailing and Igniter Leading and the timing for them when the Engine is Cold.
Take a look. Both fire at BTDC 5*
Take a look. Both fire at BTDC 5*