Guys,
Looking for some advice & pointers concerning a TTA hard start problem:
Stock Fuel Pump, FP Reg, & Injectors. (Thrasher 92 chip)
Car has been in storage with Fuel stabilizer, was fine last fall. Have now run injector cleaner through a couple tanks of gas. 23K miles
After the car sits overnight, it takes at least 10 attempts to get the car running. Once the car "clears it's throat," it runs fine and re-starts fine. Hot re-start has NOT been and issue. Once running, the car idles silky smooth and runs strong.
Car smells rich at cold start up. Blackish smoke comes out the back for just a couple seconds.
At the first cold start attempts, I now hear a buzzing noise going through the FP Regulator. I'm guessing this is the fuel rail pressurizing. My initial guess was this was due to the system re-pressurizing from a leaky injector or leaky fuel pump check valve. I thought the buzzing might be from the FP Reg diaphragm vibrating & re-bleeding, along the lines of the vapor lock scenario. There doesn't appear to be any gas in the vac line at top, so I think the FP Reg is ok. After running, the car can be re-started and the buzzing in the FP Reg goes away. Also after energizing the key and fuel pump several times, I can make the buzzing come and go on cold start.
Also on cold start, it sometimes sounds like the IAC is "ticking" or "clicking." Similar to above, I don't notice this problem on hot re-start.
????
Fuel Press Leak down results:
41psi @ key on energize
32 psi @ 4 minutes
24 psi @ 10 min
18 psi @ 18 min
18 psi @ 22 min
(Engine running vac off 44-45 psi) - OK
To be honest, I was expecting worse leakdown values. This makes me wonder if it really is a leakdown issue.
All plugs appear black and sooty, but have been in for at least 10K miles. Now has fresh R42LTS's gapped @ 0.034".
To top it off, the car also threw a code 41 (camshaft sensor) & 42 (EST). Camshaft sensor has never been adjusted. Coil pack is the original factory unit.
Any advice would be greatly appreciated.
Thanks
Dave
Looking for some advice & pointers concerning a TTA hard start problem:
Stock Fuel Pump, FP Reg, & Injectors. (Thrasher 92 chip)
Car has been in storage with Fuel stabilizer, was fine last fall. Have now run injector cleaner through a couple tanks of gas. 23K miles
After the car sits overnight, it takes at least 10 attempts to get the car running. Once the car "clears it's throat," it runs fine and re-starts fine. Hot re-start has NOT been and issue. Once running, the car idles silky smooth and runs strong.
Car smells rich at cold start up. Blackish smoke comes out the back for just a couple seconds.
At the first cold start attempts, I now hear a buzzing noise going through the FP Regulator. I'm guessing this is the fuel rail pressurizing. My initial guess was this was due to the system re-pressurizing from a leaky injector or leaky fuel pump check valve. I thought the buzzing might be from the FP Reg diaphragm vibrating & re-bleeding, along the lines of the vapor lock scenario. There doesn't appear to be any gas in the vac line at top, so I think the FP Reg is ok. After running, the car can be re-started and the buzzing in the FP Reg goes away. Also after energizing the key and fuel pump several times, I can make the buzzing come and go on cold start.
Also on cold start, it sometimes sounds like the IAC is "ticking" or "clicking." Similar to above, I don't notice this problem on hot re-start.
????
Fuel Press Leak down results:
41psi @ key on energize
32 psi @ 4 minutes
24 psi @ 10 min
18 psi @ 18 min
18 psi @ 22 min
(Engine running vac off 44-45 psi) - OK
To be honest, I was expecting worse leakdown values. This makes me wonder if it really is a leakdown issue.
All plugs appear black and sooty, but have been in for at least 10K miles. Now has fresh R42LTS's gapped @ 0.034".
To top it off, the car also threw a code 41 (camshaft sensor) & 42 (EST). Camshaft sensor has never been adjusted. Coil pack is the original factory unit.
Any advice would be greatly appreciated.
Thanks
Dave
