tigerboy rei i

s4 n/a

Driving down the highway two of the plastic clips for the ecu harness broke, harness worked out of hangers, melted on header, shorted out, blew motor. Got new engine and trans. Installed. Now when I start the car it misses and backfires. I repaired the harness, tried a new computer, no such luck. I did notice on the new engine that the egr is blocked off. I think I plugged all the vacuum lines necessary. Also is premix, so I made a block off for omp, the injectors, and the vac spider. No longer has the aav or acv (blocked off). Ports wired open, dashpots removed, vac line plugged. What could be the problem? I did notice a nice whack on top of the cas (cover was dented in pretty far). Could it be broken now? I'm thinking of changing it anyway and timing the car, but could anything else cause this? Shorted out the pressure sensor? Maybe the resistor pack? How could I check these things? It does start and run (however bad it may be) with ease, just backfires and misses, which leads me to think the afm is still good. Could the fuel pump be running irratically now?

All help welcome, appreciated, and thanked ahead of time.

tigerboy rei i

Photos are available on request of any parts, block off plates, hose routing, etc..

BTW, post 100 finally! Only took a little over 2 years!

tigerboy rei i

Changed CAS, timed it. Still misses and backfires, overheats very quickly, stalls.

Icemark

recheck timing, make sure you have a good spark,

and wiring open the aux ports will often result in a bad idle on a S4