Variable Intake Problems
#1
Variable Intake Problems
I need help with diagnosing a VI problem.
I have a 2002 3.5.
I dont think mine is activating, if i rev it up to redline and watch the valve it will move for about a half a second and then go back to stationary. It does this at about 5200 rpm. I had a dyno done a while back but the hp drops at 5200 instead of going up. i only ended up with 187hp and 201torque or something like that.
I have a homemade intake but when i did the dyno it was stock.
any help would be apreciated.
I have a 2002 3.5.
I dont think mine is activating, if i rev it up to redline and watch the valve it will move for about a half a second and then go back to stationary. It does this at about 5200 rpm. I had a dyno done a while back but the hp drops at 5200 instead of going up. i only ended up with 187hp and 201torque or something like that.
I have a homemade intake but when i did the dyno it was stock.
any help would be apreciated.
#2
Re: Variable Intake Problems
Originally posted by Davidr07
I need help with diagnosing a VI problem.
I have a 2002 3.5.
I dont think mine is activating, if i rev it up to redline and watch the valve it will move for about a half a second and then go back to stationary. It does this at about 5200 rpm. I had a dyno done a while back but the hp drops at 5200 instead of going up. i only ended up with 187hp and 201torque or something like that.
I have a homemade intake but when i did the dyno it was stock.
any help would be apreciated.
I need help with diagnosing a VI problem.
I have a 2002 3.5.
I dont think mine is activating, if i rev it up to redline and watch the valve it will move for about a half a second and then go back to stationary. It does this at about 5200 rpm. I had a dyno done a while back but the hp drops at 5200 instead of going up. i only ended up with 187hp and 201torque or something like that.
I have a homemade intake but when i did the dyno it was stock.
any help would be apreciated.
#3
Re: Variable Intake Problems
Originally posted by Davidr07
I need help with diagnosing a VI problem.
I have a 2002 3.5.
I dont think mine is activating, if i rev it up to redline and watch the valve it will move for about a half a second and then go back to stationary. It does this at about 5200 rpm. I had a dyno done a while back but the hp drops at 5200 instead of going up. i only ended up with 187hp and 201torque or something like that.
I have a homemade intake but when i did the dyno it was stock.
any help would be apreciated.
I need help with diagnosing a VI problem.
I have a 2002 3.5.
I dont think mine is activating, if i rev it up to redline and watch the valve it will move for about a half a second and then go back to stationary. It does this at about 5200 rpm. I had a dyno done a while back but the hp drops at 5200 instead of going up. i only ended up with 187hp and 201torque or something like that.
I have a homemade intake but when i did the dyno it was stock.
any help would be apreciated.
#5
Originally posted by ducky
I bet it is your VI. my dyno dropped at 5200 also on my '02 and I've acknowledged that it is my VI causing the problem..
I bet it is your VI. my dyno dropped at 5200 also on my '02 and I've acknowledged that it is my VI causing the problem..
#7
okay...yes 2k2 2k3 do have VI activates at about 3000-3500 rpm, ive dyno'ed mine and watched that actuator do its job.
Tita6: i would have that hestiation TSB done to your car and make sure they change your MAF sensor. That 4000 rpm lag or loss of power, that happens intermittently, is one of my symtoms for a failing MAF sensor. It might get worse to the point where going over 4000 rpm will be very slow. Or your'll go into limp mode soon. I'll bet 5 bucks this will happen wihtin 6 months.
Tita6: i would have that hestiation TSB done to your car and make sure they change your MAF sensor. That 4000 rpm lag or loss of power, that happens intermittently, is one of my symtoms for a failing MAF sensor. It might get worse to the point where going over 4000 rpm will be very slow. Or your'll go into limp mode soon. I'll bet 5 bucks this will happen wihtin 6 months.
#10
Originally posted by chinaonnitrous1
okay...yes 2k2 2k3 do have VI activates at about 3000-3500 rpm, ive dyno'ed mine and watched that actuator do its job.
Tita6: i would have that hestiation TSB done to your car and make sure they change your MAF sensor. That 4000 rpm lag or loss of power, that happens intermittently, is one of my symtoms for a failing MAF sensor. It might get worse to the point where going over 4000 rpm will be very slow. Or your'll go into limp mode soon. I'll bet 5 bucks this will happen wihtin 6 months.
okay...yes 2k2 2k3 do have VI activates at about 3000-3500 rpm, ive dyno'ed mine and watched that actuator do its job.
Tita6: i would have that hestiation TSB done to your car and make sure they change your MAF sensor. That 4000 rpm lag or loss of power, that happens intermittently, is one of my symtoms for a failing MAF sensor. It might get worse to the point where going over 4000 rpm will be very slow. Or your'll go into limp mode soon. I'll bet 5 bucks this will happen wihtin 6 months.
I will see if I can convince those idiots, I mean, friendly service guys at the dealership to replace it under warranty. Man, I thought I was going to have to duct tape them to their desk and start pulling teeth with their pliers to get them to do the TSB. It was worth it though.
#13
yeah, the switchover point is 3800 for the vq35. I know I've read though of a couple instances where people with failed VI noticed dropoffs after 5200 in the dyno though. I tested by disconnecting VIAS and running my car to find that there was no difference in performance than when it was connected.. It's a loose idea, but I'm going with it in hopes of fixing things.. David, if I find a fix for mine, I'll let you know. It seems we're having about the same problem.
#14
Sorry had to re install my whole computer,
I do have a dyno chart, it was done in about jan-feb
i dont know how to set up a link though, i dont have a web site.
My brothers girlfriends mom also has a 2003 3.5 and it does the same thing with just clicking and then going back. I hope that that is how they are suposed to work, because if not then they are just using another thing to get sales.
I do have a dyno chart, it was done in about jan-feb
i dont know how to set up a link though, i dont have a web site.
My brothers girlfriends mom also has a 2003 3.5 and it does the same thing with just clicking and then going back. I hope that that is how they are suposed to work, because if not then they are just using another thing to get sales.
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