Please Take This Question Seriously
- Thread starter LoveMy7MGTE
- Start date
I think you have a baseline timing problem. Im willing to bet that your timing belt/camshafts and/or your CPS are not installed correctly. Do a compression check if you have a gauge handy.
Bad compression -> valve timing
Good compression -> CPS timing
Maybe you have the CPS installed at TDC exhaust?
Bad compression -> valve timing
Good compression -> CPS timing
Maybe you have the CPS installed at TDC exhaust?
This shouldn't matter, due to the wasted spark system, unless I miss my guess...p5150 said:
Good call on the timing / cam setup.
GrimJack said:
I'm pretty sure I have the cams right, the intake i can see the lobe through the oil fill hole at tdc, the exhaust I'm not sure, when i had the head redone the machinest had to move them when milling my head. How do I check that?
Look at the marks on your cam sprockets.
http://www.cygnusx1.net/supra/library/TSRM/em/EM_23.html
Just for the purpose of aligning the cams (because it is sometimes difficult to see the marks perfectly) I will sometimes use a long 10mm bolt and screw it into the head through the spokes of the sprocket to serve as a visual aid.
Another thing you need to make sure is correct:
Look at step 8b. Do you see the three dots on the center of the camshaft's sprockets? Make sure the the sprockets are installed correctly.
-0 --0
0 0 0 0
They should look like that. It is possible to install the sprocket incorrectly on the camshaft - your engine will never start in this case.
http://www.cygnusx1.net/supra/library/TSRM/em/EM_23.html
Just for the purpose of aligning the cams (because it is sometimes difficult to see the marks perfectly) I will sometimes use a long 10mm bolt and screw it into the head through the spokes of the sprocket to serve as a visual aid.
Another thing you need to make sure is correct:
Look at step 8b. Do you see the three dots on the center of the camshaft's sprockets? Make sure the the sprockets are installed correctly.
-0 --0
0 0 0 0
They should look like that. It is possible to install the sprocket incorrectly on the camshaft - your engine will never start in this case.
update, I just checked my codes and its throwing codes 31, 14, and 51, all of which list ECU as a trouble area. And I have power at the injectors but no pulse, which also seems to be an ecu problem. Time for a new ecu?
LoveMy7MGTE said:
Start over. Remove the EFI fuse for 30 seconds to clear the codes then try and start the car. Then read the codes again. Code 14 is caused by no feedback from the ignitor. Code 31 is caused by a bad Ks signal from the AFM. Code 51 is caused by the IDL contacts on the TPS not being closed. Of course, all of these can also be caused by wiring problems in addition to the sensors. It's possible these codes can be ecu related but highly unlikely.
Check the connectors on the mentioned parts. For the code 51 be sure the there is continuity between the IDL contacts on the TPS when the throttle is closed. You should only get a code 51 when the throttle is opened with the diag block jumpered. It should disappear when the throttle is closed.
For code 31, check to sure you have 5 volts between E1 and Vc. Or remove the AFM and check the resistances as per the manual.
Fwiw, neither a code 51 or 31 will prevent the engine from starting. It won't run right but it'll start. A code 14 however can result in no spark or injection so I'd focus on that. Odd, because you claim the car starts using starting fluid. Are you sure the CPS is installed correctly? At any rate, clear the codes and try again so you can start with fresh data.
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I dont work at Toyota anymore. However I will say in my time there, an ECU is a very rare event. In fact, it was just once. The injectors are powered by the battery, indirectly. The ECU just supplies a ground path. But only if all the other information to the ECU is correct.
On a seperate point, the combustion triangle is air/fuel ratio, spark, and compression. If the engine is out of time, it will not start.
Do what jetlock said about clearing the codes and recheck. If your ignitor or coil fails, you will not start. That code means the IGF signal did not occur. Threre are two signals from that circuit. IGT, is ignition trigger, IGF is ignition fire. It is there to let the ECU the coil fired successfully.
With mulitple codes like that though, I would think of a bad harness connection someplace. The ECU is listed as the last cause becuase it is the least likely. But that doesnt mean it can't fail. You never know.
re-set the ecu and try to start it once, pull all the codes. I was getting the same codes and it was all because of my cps.