SR Problem (Searched)

[Souless]

Hello, I don't post here that much because I basically just come in and properly use the search button. Unfortunately I searched a lot and could not find a similar problem to this.Here are the details:90 CoupeRedtop SRStock Boost, Stock Turbo, Stock ECU.Motor has good compression.

Problems starts when it hits boost. The engine will rev to w/e RPM as long as it's at vacuum, once it hits boost (around 5psi), it just hits a wall. It falls flat on its ***. At first glance we thought it was a boost leak, the vehicle originally had an EBAY bov, I changed that to a Greddy TypeR. Originally it had some sloppy *** turbo inlet pipe which sat the MAF too close to the turbo, changed that. I had the harness redone completely thinking it was some screwed wiring by the previous owner.

Injectors work, Coils work, Timing should be good. But if timing was the culprit of this problem, the car would basically break up at a certain RPM and then rev up till redline, basically when it hits this "wall", it just stops. Only option is to let off.

Only other option is the ECU or maybe the CAS. I'm wondering if anyone has experienced a problem like this before. Motor turns on fine, idles perfect, doesn't overheat....nothing. Just this one problem.

[Kalypso]

well, because your car looks so damn good, I'll get this thread rolling by asking if you've checked the ecu codes.

have you tried a different maf?

picks of the engine bay would be a bonus.

[Souless]

^Thanks. Car on my sig is my old hatch though.

Yes I checked the codes. First it threw at 12. Which is the MAF, that was before I re-did the harness though, haven't checked again.

The second code it threw though was a 55. Which is "No Malfunction"

Now, this is in theory, if the MAF wiring was fawked (which it was) then maybe the ECU would first throw at 12 then a 55...

Now, again I haven't checked the codes since re-doing the harness and I am getting another MAF tomorrow...

[Souless]

Checked codes=55.Replace plugs with BKR6s gapped at 30=Same problem.Checked ECU part numbers come back ok.

I still got the same problems, anybody got any other ideas?

[del82]

If you're sure you aren't leaning out, well...honestly besides MAF, I've got nothin. A tech in your area can bridge the ECU to a breakout box to check the wires while driving though, if you find a decent shop. If it's an intermittent thing and you know your wires have been previously butchered, that's what I'd look at very closely.

What exactly do you mean by "re-did" your wiring? You splice some stuff in, or just (properly) replace the harness?

[skaterfromvt]

fuel pump starting to fail? check fuel pressure do u have a walbro in it?