TimF
10+ Year Contributor
- 823
- 5
- Mar 14, 2011
-
Aurora,
Illinois
Ok so I have a 91 tsi awd project car that I rebuilt the motor in and am now trying to get it derivable. The issues I am having are the car will start turn key no problem, idle decent then the idle just goes to shit and is everywhere, ranging from 400rpm and 1300rpm. (kind of in a surging motion but sometimes drops lower/ goes higher than the time before) If I give it gas the car will rev up and and hold the rpm at the given amount of throttle opened. If i let it sit with no gas it just stalls, but always turns right back over. issue two is I can not rev past 3k with out the car bogging out, and the turbo will not build boost ( will go to 0 on the boost gauge but never actually builds psi) I am sure this may be related with issue one. When the car is rolling and my foot on the gas it drives fine, but still wont go past 3k, and stalls when I go into neutral unless I keep my foot on the gas
Now here is the mod list of the car
6 bolt block, rebuilt with stock crank, 6 bolts rods and evo pistons, all arp hardware and bse
6 bolt head with FP springs and retainers, 272 cams skunk2 adj cam gears, 3g lifters
hx35 with BEP housing, evo3 cast manifold with tial 38mm wastegate off manifold to dump, SS o2 housing to 3in megan DP (pipe is open no cat back on car yet)
Punishment racing IC with piping and real GReddy BOV and 1g nt TB
FIC 1000cc injectors, aeromtive fpr, russel SS fuel filter and walbro 255 pump with rewire, fuel pressure set correctly
ECMlink v3 full on speed density (4bar omni sensor and GM IAT with plug in harness) boost gauge, wideband, oil pressure (reading flow to turbo) and coolant temp gauges
New NGK plugs, wires and coil pack
Here is what I have done and determined I need to resolve
Boost leak test, TB is leaking from shaft seals, new seals will be installed along with FIAV bypass and new BISS o ring (also leaking)
Injector is leaking air so new bottom seals will be installed, I tightened all couplers that had slight leaks BOV is not leaking at all. I still dont feel that the small leaks would cause that much issue but I may be wrong.
ECMlink settings are set for omni and gm sensor, and injectors. although my intake temp sensor always reads 77* regardless of current temp (faulty sensor?) all other senors are working
wastegate is not leaking exhaust
turbo seems healthy, no shaft play, no signs of blown seals (no oil in intake and no burnt oil in exhaust) wheel spins fine and you can here it spooling at idle and start to spool up when you give it gas.
checked timing with gun and link both read correctly
I am wondering what other things to look for(both mechanically and on link) to try and get my car running right for the time being I just want to be able to casually drive and break the motor in and then I will have it professionally tuned. thanks in advanced
Now here is the mod list of the car
6 bolt block, rebuilt with stock crank, 6 bolts rods and evo pistons, all arp hardware and bse
6 bolt head with FP springs and retainers, 272 cams skunk2 adj cam gears, 3g lifters
hx35 with BEP housing, evo3 cast manifold with tial 38mm wastegate off manifold to dump, SS o2 housing to 3in megan DP (pipe is open no cat back on car yet)
Punishment racing IC with piping and real GReddy BOV and 1g nt TB
FIC 1000cc injectors, aeromtive fpr, russel SS fuel filter and walbro 255 pump with rewire, fuel pressure set correctly
ECMlink v3 full on speed density (4bar omni sensor and GM IAT with plug in harness) boost gauge, wideband, oil pressure (reading flow to turbo) and coolant temp gauges
New NGK plugs, wires and coil pack
Here is what I have done and determined I need to resolve
Boost leak test, TB is leaking from shaft seals, new seals will be installed along with FIAV bypass and new BISS o ring (also leaking)
Injector is leaking air so new bottom seals will be installed, I tightened all couplers that had slight leaks BOV is not leaking at all. I still dont feel that the small leaks would cause that much issue but I may be wrong.
ECMlink settings are set for omni and gm sensor, and injectors. although my intake temp sensor always reads 77* regardless of current temp (faulty sensor?) all other senors are working
wastegate is not leaking exhaust
turbo seems healthy, no shaft play, no signs of blown seals (no oil in intake and no burnt oil in exhaust) wheel spins fine and you can here it spooling at idle and start to spool up when you give it gas.
checked timing with gun and link both read correctly
I am wondering what other things to look for(both mechanically and on link) to try and get my car running right for the time being I just want to be able to casually drive and break the motor in and then I will have it professionally tuned. thanks in advanced