SC400TT Project Car Stage II by SC400TT

3 minute(s) of a 718 minute read

9-15-2009

Hey gang, I thought I would update you on my progress. As mentioned previously, I spent the weekend completing the installation of the Big Brakes, and then prepping the car for start up. We filled the car with fluids, and rechecked everything one more time.

Then we disconnected the coils and cranked the engine to build oil pressure and be sure that the break in oil was well spread throughout the engine. Then we connected the coils and attempted start up. 

The car would not start. We checked over everything and found a few issues that I will be addressing over the next few days, and then I should be good.

• The injector feeding the number 2 cylinder got very hot during start up, so we disconnected it and tested the lead with a Noid tester, it showed constant light, so that indicates a problem either in the wiring or in the injector programming. I tested the lead and got a constant twelve volts which should not happen.

• I also checked the injector, and it ohmed out fine, 2.2 ohms constant. I ordered another injector to replace it just as I am uncomfortable with it since it overheated so much.

• I need to check and verify the Cam sensor set up in the SM4.

So, hopefully everything will be completed out and we can reattempt start-up on the car this weekend.

I will keep you updated.

9-16-2009

Well, after a few hours of trouble shooting the harness, as well as over an hour on the phone with Autronic (Most excellent customer support from Autronic), Scott and I determined that the batch-fire wiring for injector #2 was inadvertantly tied to ground instead of the ECU, and the +12v switched source that powers all the injectors was tied into injector #2 on the SM4. This resulted in frying injector #2 because there was a short circuit to ground due (through the injector) when power was applied with the key "on".

Luckily, the motor was not hydrolocked, and there was not any conrod damage. The injector most definitely needs to be replaced, as the plastic casing is partially melted, with clear burn marks on it. Plus, I found fuel in the connector receptacle when I unplugged the clip from the injector, and the only way that could have gotten there was for the injector to crack internally and fuel to be forced up into that area. I have ordered another one. 

This was a most unfortunate event. We are now going to go through the entire loom to make sure everything is correct. To note, the wiring was thoroughly checked after getting the loom back, but only at the ECU. Should have checked each injector lead as well.

The good news is that this does not appear to be a huge set back, and it should be corrected this week. Perhaps she can start up this weekend.....