Long start when cold diagnosis.
Troubleshooting this is relatively simple. After letting it sit (morning) turn the ignition to run (not start). This will allow the fuel pump to prime the system. Repeat this 4 or five times then start. If it starts right away then you have a fuel pressure problem. There are a few things that will cause a loss of pressure.
1. external leak
2. leaking fuel injector
3. bad check valve in the fuel pump
4. internal leak within the fuel pressure regulator (FPR)
5. leak from the diaphram of FPR to vacuum line
-If you don't smell gas - disregard #1
-If it runs fine when started - disregard #2
-To check if it is the fuel pressure regulator #5 pull vacuum line and check for fuel.
- to check the fuel pressure regulator #4 and fuel pump #3 you will need a fuel pressure gauge and something to crimp the fuel lines shut.
- with the fuel pressure gauge hooked up, install a crimp before the FPR and perform the prime as described above. Let it sit for a bit and watch for a fuel pressure drop. If it drops then the problem is in the fuel pump. If it is fine proceed to next.
- Prime system to pressure and install crimp after the FPR. If pressure does not drop then the problem is in the FPR.
Hope this helps here.
1992 Bonneville SSEi
White, grey Leather interior.
Tinted windows and blackouts on headlights.
Custom high flow exhaust, Everything replaceable - DONE
300 000 kms original engine, tranny 2 rebuilds.
Playboy Bunnies Embossed in Tint. Oh Yah!
Ever Seen a Polar Bear in a Snow Storm?