A few days ago I installed the Beisan VANOS seals. I found they were much needed along with the exhaust cam sensor. Long story short, it feels much better. However I still have two problems, possibly related to each other.
When cold, for example sitting over night, it will still drop idle to below 500 rpm or so for a second and shoot back up to normal idle (~1k rpm before secondary air pump shuts off). I know bad VANOS seals can cause this symptom, but I'm confident in the job I did replacing those seals. It does this until about the quarter mark on the temp gauge. Once it's warmed up to the quarter mark I start driving and it idles at 600 with no shaking or rough idle. Quite smooth.
The second issue I've found is that after I've driven it up to operating temp, park, then try to start it up again (think running to the grocery store and back) it will stall as soon as I start letting the clutch out and start accelerating. This happens in reverse and during take off from first. At first I thought this was related to the VANOS and Exhaust cam sensor because it was doing this before I replaced those parts. But it did it to me again the day after replacing the seals and sensor.
If I try hard enough and give it a lot of gas and keep the RPMs above 1k I can aggressively drive it home, but if I don't do this it will stall when coming to a traffic light or during deceleration to the point where it reaches idle.
I DO know that I have a vacuum leak and I have a feeling that it truly is the problem since I have no SES light or anything. I just wanted to gather some knowledge here in hopes that there isn't another cause. The last thing I want to do is hunt down vacuum leaks because I know it's going to be a headache. I can hear some fairly loud hissing at what seems to be the top rear portion of the intake manifold area.
I don't own a T40 bit/socket yet so I don't want to just start tearing things apart unless I can do the whole job. I'd like to clean the throttle body and ICV when I go to replace the intake boots. Anyone have any input or ideas as to where a vacuum leak could be located in that area?
I haven't considered fuel pump or filter yet solely because I know there is a vacuum leak. Also, the VANOS was a breeze and I can pretty confidently rule out those being an issue.
Sorry for the TL;DR.. :blah::blah:
When cold, for example sitting over night, it will still drop idle to below 500 rpm or so for a second and shoot back up to normal idle (~1k rpm before secondary air pump shuts off). I know bad VANOS seals can cause this symptom, but I'm confident in the job I did replacing those seals. It does this until about the quarter mark on the temp gauge. Once it's warmed up to the quarter mark I start driving and it idles at 600 with no shaking or rough idle. Quite smooth.
The second issue I've found is that after I've driven it up to operating temp, park, then try to start it up again (think running to the grocery store and back) it will stall as soon as I start letting the clutch out and start accelerating. This happens in reverse and during take off from first. At first I thought this was related to the VANOS and Exhaust cam sensor because it was doing this before I replaced those parts. But it did it to me again the day after replacing the seals and sensor.
If I try hard enough and give it a lot of gas and keep the RPMs above 1k I can aggressively drive it home, but if I don't do this it will stall when coming to a traffic light or during deceleration to the point where it reaches idle.
I DO know that I have a vacuum leak and I have a feeling that it truly is the problem since I have no SES light or anything. I just wanted to gather some knowledge here in hopes that there isn't another cause. The last thing I want to do is hunt down vacuum leaks because I know it's going to be a headache. I can hear some fairly loud hissing at what seems to be the top rear portion of the intake manifold area.
I don't own a T40 bit/socket yet so I don't want to just start tearing things apart unless I can do the whole job. I'd like to clean the throttle body and ICV when I go to replace the intake boots. Anyone have any input or ideas as to where a vacuum leak could be located in that area?
I haven't considered fuel pump or filter yet solely because I know there is a vacuum leak. Also, the VANOS was a breeze and I can pretty confidently rule out those being an issue.
Sorry for the TL;DR.. :blah::blah:
Aucun commentaire:
Enregistrer un commentaire