SteveZ82
Active Member
I've been chasing a couple of small issues the last year or so. I don't drive the car much this year because I moved and other life stuff got in the way. Anyway, I try to get the GN out at least 1-2 times a month to waken things up and put about 10-20 miles on each time. Mostly, as I've posted this before, I will get some knock when in about 17-18 psi boost so don't boost the car that much. The more pressing issue is hard starting when cold after been sitting. It hasn't done this when I bought the car, so this is fairly recent, and I chalk it up to it sitting for long periods of time. When it does start, it stumbles a bit then levels out and runs fine. Throttle is responsive, rides great, no issues. I'll list upgrades and mods now:
- TT 5.6 chip, 42lb, 16-18 psi
- adjustable FPR set to 42 psi line off engine warm
- New fuel pump (probably less than 100 miles on it) and filter
- RJC power plate
- Rebuilt cam sensor
- New plugs, wires, ICM and coil pack
Symptoms are hard cold start. I prime the fuel rails, key on off a few times, crank once, then twice, then three times and it springs to life. I notice that when the oil light goes off it tends to start right away, but that is new. When it starts, it stumbles up to about 1800 RPM, then settles down in about 30 seconds.
Symptom two, is after it's warm and parked for a bit, it starts right up but have a very rough idle in park that gets perfect when in gear. I checked the IAC and my scan master numbers and the IAC looks fine, but it's lean until it sees a gear, then it's all good.
I'm probably being nitpicky but I'm debating replacing my injectors. We suspected the FP leaking off was a bad check valve in the pump but it's still leaking off with a new pump. I talked to Eric at TT and they were bought as a kit from Cotton's according to his records. So, I don't know how old the injectors are but I'm guessing pretty old. I don't smell raw fuel, plugs look good, and I change the oil every year. Since I'm parking it soon for the winter, I'm thinking either replacing the injectors or taking them off and soaking/cleaning them. Thoughts there? I just hate the thought of an injector or two leaking into the cylinders.
- TT 5.6 chip, 42lb, 16-18 psi
- adjustable FPR set to 42 psi line off engine warm
- New fuel pump (probably less than 100 miles on it) and filter
- RJC power plate
- Rebuilt cam sensor
- New plugs, wires, ICM and coil pack
Symptoms are hard cold start. I prime the fuel rails, key on off a few times, crank once, then twice, then three times and it springs to life. I notice that when the oil light goes off it tends to start right away, but that is new. When it starts, it stumbles up to about 1800 RPM, then settles down in about 30 seconds.
Symptom two, is after it's warm and parked for a bit, it starts right up but have a very rough idle in park that gets perfect when in gear. I checked the IAC and my scan master numbers and the IAC looks fine, but it's lean until it sees a gear, then it's all good.
I'm probably being nitpicky but I'm debating replacing my injectors. We suspected the FP leaking off was a bad check valve in the pump but it's still leaking off with a new pump. I talked to Eric at TT and they were bought as a kit from Cotton's according to his records. So, I don't know how old the injectors are but I'm guessing pretty old. I don't smell raw fuel, plugs look good, and I change the oil every year. Since I'm parking it soon for the winter, I'm thinking either replacing the injectors or taking them off and soaking/cleaning them. Thoughts there? I just hate the thought of an injector or two leaking into the cylinders.
