When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Correction, it wasn’t a head rebuild, more like a head swap. Had a Buschur stage 3, a valve spring broke and basically damaged the head beyond repair. Pistons remained untouched. Swapped my OEM head back on, salvaged the cams, all other valvetrain components are new. Everything was out back together, timing was triple checked, and the cars cranks but won’t run. It’ll turn over and start for a second, incredibly rough then immediately die. Almost don’t even consider it starting up, more like rolling over. Build is as follows:
Timing has been checked over a dozen times. Emptied tank, put in fresh E85. Checked fuel pressure, checked spark, checked CEL codes, threw cam and crank position sensors codes, replaced both. New battery, checked starter grounding, checked compression and leak down test accomplished, check all connections, did a boost leak test, even checked oil and checked tune. Currently working with Tom at TSComp with the tune......we’re at a dead end. Any help would be appreciated.
Last edited by EVILutionVIII; Jun 22, 2019 at 11:20 AM.
Reason: Changes made
both sensors share a common ground, pin 40 of C-119 at the ECU. I would verify continuity between that ecu pin and both sensors. Its 90-34 through 90-35 in the factory service manual.
Update: sensors replaced, no codes. Checked timing again, everything lines up. Checked all connections, rechecked injectors, everything looks good. It tries to turn over but when it does, it’s not strong at all. It sputters for a second before dying. I’ll post a video when I can.
After a few recent attempts, it starts up and runs good for a few seconds then immediately cuts off. Throws the same two codes: 0335, 0340. Checked both sensors for signal, both are good. About to change out the crank trigger plate (thanks for recommendation Tom).
