New turbo owner, NA to TII conversion. Problem idling
08-12-06, 10:57 PM
#1
Senior Member
Thread Starter
New turbo owner, NA to TII conversion. Problem idling
I'm trying to get my car road worthy, and I'm having a couple of issues still. Here's the car:
88 GXL with a Complete TII drivetrain swap.
Street ported intake and exhaust
All emmisions removed
Throttle body mod
3" Rb exhaust
Rtek 1.7
Greddy 720 cc secondaries and Witchhunter cleaned, stock 550 primaries
Autometer cobalt electronic boost gauge
Walbro 255Lbh fuel pump.
So the the first problem is this> The car wants to die, whenever I let off of the gas. Sometimes I can get it, to keep itself running, but it's @ 2500 rpm. I'm forcing it there by using the adjustment screw. While it runs I see 15in? of vac on the boost gauge and when I rev it, It'll get to 0. I've driven the car in around the neighborhood, and it wants to buck during light throttle.
The second problem is that the temp keeps rising to 3/4. It doesn't happen for quite sometime, but it keeps happening. I think it may just be taking more to fill, than I thought.
There is also a possibilty that 2 of my vac lines might be switched. I'm running the primary injector air bleed, and the FPR vac lines, right next to each other. I don't know if I have the line coming from the LIM, or if it's the one, from near the primary injectors. How can I figure out which line is which?
All of the other Vac lines are capped, except for the one on the top of the UIM, facing the passenger fender. On that nipple, I have a vac line connected to a splitter. That splitter has the vac source for the Boost sensor, Boost gauge and the Air bypass valve.
88 GXL with a Complete TII drivetrain swap.
Street ported intake and exhaust
All emmisions removed
Throttle body mod
3" Rb exhaust
Rtek 1.7
Greddy 720 cc secondaries and Witchhunter cleaned, stock 550 primaries
Autometer cobalt electronic boost gauge
Walbro 255Lbh fuel pump.
So the the first problem is this> The car wants to die, whenever I let off of the gas. Sometimes I can get it, to keep itself running, but it's @ 2500 rpm. I'm forcing it there by using the adjustment screw. While it runs I see 15in? of vac on the boost gauge and when I rev it, It'll get to 0. I've driven the car in around the neighborhood, and it wants to buck during light throttle.
The second problem is that the temp keeps rising to 3/4. It doesn't happen for quite sometime, but it keeps happening. I think it may just be taking more to fill, than I thought.
There is also a possibilty that 2 of my vac lines might be switched. I'm running the primary injector air bleed, and the FPR vac lines, right next to each other. I don't know if I have the line coming from the LIM, or if it's the one, from near the primary injectors. How can I figure out which line is which?
All of the other Vac lines are capped, except for the one on the top of the UIM, facing the passenger fender. On that nipple, I have a vac line connected to a splitter. That splitter has the vac source for the Boost sensor, Boost gauge and the Air bypass valve.
08-12-06, 11:32 PM
#2
problem #1 is vac leak. if you are using the stock bov, its a recirculating valve and will be a huge vac leak.
problem #2 is air in your coolant passages. pump the lower rad hose with the cap on and burp the coolant till it fills. do that like a million times.
i dont know where the vac lines go but i think im using the nipples on the front of the mani for the pressure sensor, gauge and bypass valve. the one on the side is for the exhaust flapper thing and the ones on the back are for the injectors but im not sure. just from memory. hope that helps
problem #2 is air in your coolant passages. pump the lower rad hose with the cap on and burp the coolant till it fills. do that like a million times.
i dont know where the vac lines go but i think im using the nipples on the front of the mani for the pressure sensor, gauge and bypass valve. the one on the side is for the exhaust flapper thing and the ones on the back are for the injectors but im not sure. just from memory. hope that helps
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