problems problems problems need help

[zsmith]

i dont even know where to start lets see

for a while now i have been tring to win a battle that just doesnt seem that i am winning

i have had a problem that everyone discribes as a fuel cut problem only thing being that i have the whole fuel system, 550 cc injectors, fpr set at 42psi, fuel pump.
i have also changed plugs and wires.
i also have turbo manifold, 3" downpipe and slight oil leak, i have done a leak test and fixed them. I thought that the best way to fix it would to be get the dsmchip that removes fuel cut, well installed that today and now a new problem and old problem
still have fuel cut or simalar
new problem is that im stuck in 3rd gear and i think its the TSU.
please help no idea and about to murder.

 

[kenamond]

Please fill out your profile.

Fuel cut has nothing to do with fuel other than the fact that the ECU stops injecting it when you hit fuel cut. It's excessive airflow. The ECU senses that the motor is flowing more air than a stock fuel system can handle and stops injecting fuel until the airflow drops back down. It's a safety net for a bad boost leak or malfunctioning WGA.

Most times, fuel cut is due to a bad boost leak. You say you tested and fixed the leaks, but just to be clear on this, you have to pressurize the intake at the turbo's compressor inlet, build pressure up to ~5psi above whatever boost you're running and then stop adding pressure. You have to use an aftermarket boost gauge. It should hold that pressure or leak down slowly...like 1psi every few seconds. If you didn't test this, that's what you need to do. If you tested and it leaked down faster or didn't get up to the target pressure at all, you still have leaks that you need to fix.

What boost are you running?

You mentioned 550 injectors, pump, afpr, but you didn't mention a controller. My recollection on automatic 1g turbo cars is that the stock injectors are 390cc/min with a base fuel pressure around 42.5psi (might be off a bit there). If you put 550s in there without a fuel controller, you'll be running pig rich, because the ECU doesn't know it should pulse the injectors for less time. If you have some sort of fuel controller (AFC, DSMlink, etc), you might not have it set up right (you could hit fuel cut "sooner" if you mess up the AFC settings). But I don't know what you have because you have no vehicle profile and didn't mention it in your original post.

I don't know dick about transmissions, so can't help you there.