Hey everyone, so I've got a strange issue with my caprice. 90% of the time, it's all sweet, shifts beautifully, no clunks, shifts nice and hard in power mode, no dramas at all. This is when driving around the burbs, and in non peak time/normal traffic. Once I get stuck in peak hour, and do a lot of stop start driving, it seems to get stuck in gear, and rev really highly before it'll change, then it changes hard.
Now from what I've read, it seems to be going into limp mode, giving me 2nd and 3rd only and the increased line pressure explains the harsh changes. It also revs real high, but hardly actually moves, so you're doing like 30km/h at 3500rpm. This has happened about 5 times now, only once has the engine light come on, and after blowing a fuse trying to do the fault code check, I reset the computer trying to clear a weird issue that ended up being because of the blown fuse, which I found after.
I just had the trans serviced, and it was regularly serviced by the previous owner. The bloke changed the shift solenoids free of charge because he highly doubted it was that, but thought it was worth a try. It didn't fix it.
What I've found the last 2 times its happened is, I'll be parked on an incline, start the car up, and the trans will clunk into gear (which happens to every car that I park on the inlaws super steep driveway, so thought nothing of it) but then it does the weird holding gear revving thing, but no engine light. If I pull over and turn the car off, wait a few seconds, and turn it on again, it's fine, shifts normally, but if it clunks into gear at the first start up, it happens.
So first question is, do I have a knock sensor? And could it be the culprit, seeing as though there's a knock in the trans, then it happens. Or could it be something else? TPS, from what I've read will cause more kick down issues from higher to lower gears, which it doesn't do, if you put your foot down, it'll drop back, so I'm guessing it's not that. Maybe the IAC vavle? It does idle fairly rough, at low speed or stationary so could be that, but I don't know if that would send it into limp mode.
So I'm pretty stumped, and I'm hoping someone who knows more than me has some ideas, or some experience with this sort of thing.
Cheers!
Now from what I've read, it seems to be going into limp mode, giving me 2nd and 3rd only and the increased line pressure explains the harsh changes. It also revs real high, but hardly actually moves, so you're doing like 30km/h at 3500rpm. This has happened about 5 times now, only once has the engine light come on, and after blowing a fuse trying to do the fault code check, I reset the computer trying to clear a weird issue that ended up being because of the blown fuse, which I found after.
I just had the trans serviced, and it was regularly serviced by the previous owner. The bloke changed the shift solenoids free of charge because he highly doubted it was that, but thought it was worth a try. It didn't fix it.
What I've found the last 2 times its happened is, I'll be parked on an incline, start the car up, and the trans will clunk into gear (which happens to every car that I park on the inlaws super steep driveway, so thought nothing of it) but then it does the weird holding gear revving thing, but no engine light. If I pull over and turn the car off, wait a few seconds, and turn it on again, it's fine, shifts normally, but if it clunks into gear at the first start up, it happens.
So first question is, do I have a knock sensor? And could it be the culprit, seeing as though there's a knock in the trans, then it happens. Or could it be something else? TPS, from what I've read will cause more kick down issues from higher to lower gears, which it doesn't do, if you put your foot down, it'll drop back, so I'm guessing it's not that. Maybe the IAC vavle? It does idle fairly rough, at low speed or stationary so could be that, but I don't know if that would send it into limp mode.
So I'm pretty stumped, and I'm hoping someone who knows more than me has some ideas, or some experience with this sort of thing.
Cheers!