As briefly as I can do this:
When I say rough hot start, this is what it does. Sits over night, starts fine. Start after sitting 10-15 minutes, starts fine. Start after an hour to 4 or more (not overnight), I have to keep the starter engaged and when it does start it runs rough for several seconds (maybe 5 to 10 seconds or so)
Have posted this issue before but did more since then.
What I did:
Replaced all injectors with VDO brand. Started great in all conditions and time spans. Then it started doing the same thing again, I pulled the fuel rail, put a piece of paper under the injectors and cycled the key. Got 2 injectors that marked the paper with fuel (I posted that photo on this forum).
Replaced the injector that seemed to be leaking the most. "fixed" the issue for awhile. Started doing the same thing again, Replaced the one that has a small spot on the paper. That worked for about 2 hot starts.
Thought maybe the O-rings were the issue as I had not replaced them since I installed the new injectors.
Replaced both O-rings on all injectors and the air distribution O-rings. Did that today and the first hot start had the same starting issue.
Don't know if this means anything or not? I have noticed that when I pull the fuel rail to do whatever the MPG reading is considerably higher than normal on the first ride after doing so. I usually have 27.3, Today on my 20 miles or so drive after the O-ring replacement it was as high as 30.1. Went for a short trip after it sat for 2 hours and the MPG reads 27.6.
Maybe this means something mean something, maybe not...? When I did the O-rings today, the car had been sitting for 6 days. There was still some pressure when I pushed the Schrader valve to relieve the pressure in the fuel rail. Also still a lot of fuel in the rail when I removed each injector. So it is not leaking down completely.
The car runs fine, no check engine light. Maybe my imagination but it seemed to run a bit stronger the first several miles after the O-ring replacement.
Any ideas?
When I say rough hot start, this is what it does. Sits over night, starts fine. Start after sitting 10-15 minutes, starts fine. Start after an hour to 4 or more (not overnight), I have to keep the starter engaged and when it does start it runs rough for several seconds (maybe 5 to 10 seconds or so)
Have posted this issue before but did more since then.
What I did:
Replaced all injectors with VDO brand. Started great in all conditions and time spans. Then it started doing the same thing again, I pulled the fuel rail, put a piece of paper under the injectors and cycled the key. Got 2 injectors that marked the paper with fuel (I posted that photo on this forum).
Replaced the injector that seemed to be leaking the most. "fixed" the issue for awhile. Started doing the same thing again, Replaced the one that has a small spot on the paper. That worked for about 2 hot starts.
Thought maybe the O-rings were the issue as I had not replaced them since I installed the new injectors.
Replaced both O-rings on all injectors and the air distribution O-rings. Did that today and the first hot start had the same starting issue.
Don't know if this means anything or not? I have noticed that when I pull the fuel rail to do whatever the MPG reading is considerably higher than normal on the first ride after doing so. I usually have 27.3, Today on my 20 miles or so drive after the O-ring replacement it was as high as 30.1. Went for a short trip after it sat for 2 hours and the MPG reads 27.6.
Maybe this means something mean something, maybe not...? When I did the O-rings today, the car had been sitting for 6 days. There was still some pressure when I pushed the Schrader valve to relieve the pressure in the fuel rail. Also still a lot of fuel in the rail when I removed each injector. So it is not leaking down completely.
The car runs fine, no check engine light. Maybe my imagination but it seemed to run a bit stronger the first several miles after the O-ring replacement.
Any ideas?
