I just put a bunch of mods on my car and now I am having trouble getting it started. When I do get it started it runs real rough. I checked the plugs and the front rotor plugs look fine, the back trailing plug is wet but the lead one looks good. The mods I just added were a BNR Stage 3 turbo, Custom FMIC w/2.5" piping, 720cc primary injectors and 890cc secondary injectors, 3rd Gen alternator, E-fan, and aluminum radiator, 2.5" TB inlet. I plugged off the vac lines that used to go to my TMIC. The car was down for about a month while all this was being done. I checked all the connections last night and everthing looked good. I gave it the ol spray test with starting fluid to try and find a vac leak but nothing seemed to be affected. So anyway I never got a chance to check out the new turbo because when the car would run it ran like crap. Then I tried to start it again and it would not start. Any ideas on what to look for next..? A new motor perhaps..?

 

did you do any fuel control????

If you put 720's in over the stock 550's, you are going to be a bit fat at idle are you not?

 

Massive vacuum leak? compression check?

 

Yes I have a SAFC, would it help if I put low throttle at 0% and entered in like -15%..? How do other people run 720s in the primaries..? IS it possible my motor went..? There is no smoke but it runs like crap when I do get it started and the rear trailing plug is wet. This is what causes me to believe the rear rotor is not firing and why the engine runs real rough and shakes. Thanks for the input any other ideas suggestions as to whats going on appreciated.
Thanks

 

Mine was doing the samething with the same syptoms.
My rear rotor was gone, so do a compression test to be sure.

 

Weird, it could be its, just hard to believe becasue before I did the mods it ran fine. Still no smoke when it runs either.

 

You're either flooding the crap out of one rotor, or have a bad injector (or circuitry to that injector), is my guess...

 

Why not be sure that your rear spark plugs aren't firing.. (unplug the front rotor plugs first), then remove the rear ones and set them up on the throttlebody or someonehwere else where the outside can be grounded. then crank the car, and have someone watch the plugs.. Then you know whether or not your plugs are firing.. move on from there.

 

Use a proper spark tester. Don't remove plugs then lay them on the engine. You may ignite any fuel that is sprayed out of the engine.

First, verify spark.

Second, as posted above, use the S-AFC to lean out the primarys. You're probably running pig rich.

 

Thanks for the help guys the plugs were firing but my fuel was absent. It ended up being a broken injector plug. Thanks for all the help guys. Its nice to see a thread I started get some response LOL. Thanks Again
Jeremy