Been having an increasingly serious hard starting issue. I've been working on narrowing it down. It doesn't seem to be an air leak as I don't see any significant air in the lines and it doesn't seem to be related to how long I leave the car. I can shut it off and try to start it immediately and its just as hard to start. 5-15 cranks instead of 2 like it used to be. Timing is in spec but very close to the advanced line.
Tank is clean(looks brand new inside)
brand new sending unit
Blew out fuel lines
brand new filter and thermo T
pulled the pressure relief valve out of the IP and the guts had come out. reassembled and re-installed
just did the timing belt. problem started before that so that didn't cause the problem though it didn't fix it either
I just recently discovered my IQ is reading around 7. Not sure if thats my problem but I'll be mechanically adjusting it this weekend. I was able to get it to 6.5ish through VAG. I did notice my IP is pretty dirty on the outside and i'm thinking maybe I have a minute leak of some kind thats only recently gotten bad enough to cause starting issues. Car's a bit of a dog but otherwise runs ok. Would a tiny leak cause starting issues that quickly after shutting down? Regardless I'll be replacing whatever seals I can get to as well as the fuel temp sensor when I adjust the IQ.
Full disclosure: I run a two tank WVO system. what really has me baffled is that the car starts fine if I leave it on veg and stop and start it but with diesel in the pump it has a problem. I'm leaning toward the higher viscosity of the veg keeps the tiny leak at bay but when I have diesel in the pump the viscosity is low enough to allow the leak to effect starting. I only run veg well heated so we're not talking thick but even hot i'm sure its not as thin as diesel. I originally thought it was the difference of the veg vs the diesel side of the system but after putting diesel into the veg side I'm having the same issue on that side pointing me to the fuel type itself.
any thoughts?
Tank is clean(looks brand new inside)
brand new sending unit
Blew out fuel lines
brand new filter and thermo T
pulled the pressure relief valve out of the IP and the guts had come out. reassembled and re-installed
just did the timing belt. problem started before that so that didn't cause the problem though it didn't fix it either
I just recently discovered my IQ is reading around 7. Not sure if thats my problem but I'll be mechanically adjusting it this weekend. I was able to get it to 6.5ish through VAG. I did notice my IP is pretty dirty on the outside and i'm thinking maybe I have a minute leak of some kind thats only recently gotten bad enough to cause starting issues. Car's a bit of a dog but otherwise runs ok. Would a tiny leak cause starting issues that quickly after shutting down? Regardless I'll be replacing whatever seals I can get to as well as the fuel temp sensor when I adjust the IQ.
Full disclosure: I run a two tank WVO system. what really has me baffled is that the car starts fine if I leave it on veg and stop and start it but with diesel in the pump it has a problem. I'm leaning toward the higher viscosity of the veg keeps the tiny leak at bay but when I have diesel in the pump the viscosity is low enough to allow the leak to effect starting. I only run veg well heated so we're not talking thick but even hot i'm sure its not as thin as diesel. I originally thought it was the difference of the veg vs the diesel side of the system but after putting diesel into the veg side I'm having the same issue on that side pointing me to the fuel type itself.
any thoughts?