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I thought I had the flat 4 wire plug but was mistaken. I have a LS3 crate motor with 4 wire sensors but a different plug. I am trying to fit Bosch 4 wire sensors and need help with wire plug placement. The original sensors had 2 blk, 1 bl and 1 wht. The bosch has 2 wht, 1 gry and blk. Thanks

Ari666, do you use hp tuner? I might have to do a course and learn the insides of this computer.

Yes ari666. I have dakota digital gauges and they have an engine light in them. This is what is shitting me, I have no codes so I am just triple checking the same things.

I get the rpm indication from the odb plug so you would think that is thru the ecu. Dead head fuel system. Noid test failed as there was no light. Plugs dry. I am at a loss as well ari666.

Solid 11,8v during crank. Yes my acc drop out during crank but there is no drop in voltage to the ecm. It has to be in the ecm I think ari666?

E67 ECU, 60 psi at the rail waiting, 160 rpm on crank, but no pulse at injectors or spark? Thanks again for your help so far.

That seems to be where my problem is but I had a bloke hook up his computer and the antitheft does not even show up. It has been totally removed?

Scantool gives rpm, TPS, MAF temp, temp. Pump has 60psi waiting at the injectors. No error codes. Checked pulse at injectors with multimeter and the earth signal does change. Checked a lot of wiring today for continuity. No faults. Checked earths everywhere, ECU, coils etc, all perfect. Sorry...

E67 ECU. 58 tooth wheel.

I am thinking it matches the ECU. I think I saw 58 tooth.

Checked earth with multimeter while cranking and no change of state. Had plugs out and no spark either.

All of the VATS, BCM have been removed. Being a crate motor from GMPP it should have been plug and play? It seems it has everything but the final part of the puzzle to go bang.

Sorry mate. 60 psi at rails.

It will crank, power to coils and injectors. MAF, MAP and Rpm all work but will not fire.

I have a LS 376/525 crate motor installed and it will not start. Help please.