Hard Starting
#1
Hard Starting
Just picked up my first D2 a couple weeks ago - a Kinversand '99. While I'm waiting for the Lucky8 driveshaft to arrive, I'm sorting all the other little issues and doing basic maintenance.
The one thing I haven't been able to pinpoint is the source of a hard starting issue. Hot restarts are fine (getting gas, etc...), but cold starts and anything after sitting > 60 mins and it cranks for a long time before firing. I replaced the fuel pump yesterday morning, hoping it was a check valve issue. That doesn't seem to be the case, but there's nothing wrong with replacing a 25 year old pump for peace of mind. It seems to be pressure-related, though. Cranking with no throttle input yields a little hesitation when it fires. Cracking the throttle a little bit gets a decent rev out of it and it settles right into a smooth idle. IAC seems fine, as it idles great otherwise. Am I missing anything else before I either have the injectors cleaned, or just replace them? My best guess at this point is one or more are leaking down after shutoff.
Thanks!
The one thing I haven't been able to pinpoint is the source of a hard starting issue. Hot restarts are fine (getting gas, etc...), but cold starts and anything after sitting > 60 mins and it cranks for a long time before firing. I replaced the fuel pump yesterday morning, hoping it was a check valve issue. That doesn't seem to be the case, but there's nothing wrong with replacing a 25 year old pump for peace of mind. It seems to be pressure-related, though. Cranking with no throttle input yields a little hesitation when it fires. Cracking the throttle a little bit gets a decent rev out of it and it settles right into a smooth idle. IAC seems fine, as it idles great otherwise. Am I missing anything else before I either have the injectors cleaned, or just replace them? My best guess at this point is one or more are leaking down after shutoff.
Thanks!
#3
#4
When I did the pump on Sunday, very little fuel came out when I disconnected the line, so that seems to support the injector theory now that the pump is ruled out.
#5
#6
Can the CPS only cause issues in certain startup conditions? It seems weird that it wouldn't present any other symptoms otherwise.
#7
Your pending evap could be a clue. If the system is pressuring the evap ystem to verify there are no leaks and the injectors are leaking by, it may be detecting the pressure loss and throwing the code. With the intake apart it will eliminate further testing but I think injectors is a good start. Although, I would think that flooding the engine in 60 minutes of sitting would be enough of a leak to cause AFR problems in the form of misfires or running rich. Maybe not.
#8
Your pending evap could be a clue. If the system is pressuring the evap ystem to verify there are no leaks and the injectors are leaking by, it may be detecting the pressure loss and throwing the code. With the intake apart it will eliminate further testing but I think injectors is a good start. Although, I would think that flooding the engine in 60 minutes of sitting would be enough of a leak to cause AFR problems in the form of misfires or running rich. Maybe not.
I'm *ok* with throwing some parts at it in this case, since most of it is almost 25 years old and I don't know the history of it.
EDIT: for reference, the evap code is P0447 - Emissions system vent control open
#9
#10
Hopefully there isn't any damage to the cylinders. Seems to run just fine, so I don't think it's overfueling. The big question is how long it's been doing this, and how diluted the oil is.