Bog at launch

[tcouty87]

Done alot of thread searches and am a n experienced mechanic bout this one has me stumped. When coming from a stop my 98 gst wants to lug pretty bad until the boost kicks in then it takes off like a bat out of hell. Its done it ever since I got the car. I put a new fmic with piping changed the coils (1 was already shot but I changed em both) new wires with new plugs correctly gapped, done voltage and ohm tests on the tps map and maf. Done a boost leak test as well as checked all other vacuum lines n fixed all leaks. Has eve delete so I checked all capped off wires n no leaks there either. Has stock t25 ( have a big 16g and dsmlink waiting to go in, but wanna fix this before I swap out the ecu for the chipped one)

Runs at 13.2 afr at idle n drops to 12.6 when launching. When I say launch I mean a normal go from stop lights, not race launching. When I actually drop the clutch at 3200-3500a rpm it'll smoke the tires n take off fine.

Any ideas?

Thanks,
tim

 

[robtheturbopric]

you might have an injector problem. my old laser turbo did this and i spent a month beating my head against the wall. one day the single injector that was causing the problem finally let go all the way. so id try and swap out the injectors or at least test and clean them.

 

[tcouty87]

Thanks rob ill check em out. I have the 750s2 sitting around so ill throw those in n see if it helps with the tune. I usually just ohm test them . Did tours run fine after about 10-15the mph?