!!!Found our 3-4K hesitation!!!
#1
!!!Found our 3-4K hesitation!!!
Ok so i was cleaning under the hood yesterday. I did my my own version of the VIAS block plate last year. When i did this i plugged the vacuum hose that runs to the valve on the VIAS. I left everything else the way it was. SO i was cleaning last night and thought that once the engine reaches 3-4k and the ecu tells the acuator to open to allow a vacuum for the valve to open. I figured this momentary opening and letting the Vacuum Can build vacuum for the VIAS is giving that few seconds of a hesitation, just like you woul feel if there was a gasket leak. So i disconnected the vacuum hose running to the acuator (blue arrow) and put a cap on the spout coming off the UIM (red arrow)
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All i can say is the car now pulls right thru 3k wit hno hesitations. It is like a new motor.
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All i can say is the car now pulls right thru 3k wit hno hesitations. It is like a new motor.
#3
For reference, here's NWP's instructions...
http://www.nwpengineering.com/VQ35DE_FWD_VIAS.pdf
Same procedure should be done with DIY'er.
Here is mine...
This was before NWP even made them.
http://www.nwpengineering.com/VQ35DE_FWD_VIAS.pdf
Same procedure should be done with DIY'er.
Here is mine...
This was before NWP even made them.
#5
Sucks doesn't it...
Same thing happened to me with a really nice MAF adapter I purchased on eBay.
r-tec-3-maf-aluminum-adapter-cheap-alternative-custom-intakes-pictures
Same thing happened to me with a really nice MAF adapter I purchased on eBay.
r-tec-3-maf-aluminum-adapter-cheap-alternative-custom-intakes-pictures
#10
its actually working good. i got it at HD and removed all the junk inside. it has the tiny screw plug on the bottom so i can take a small cup and drain it into the cup. i haven't drained it in prob 2 months and only have less than a measured fluid cup.
#13
Hey, Scott. You know what? -- I still haven't done this yet. It's in my plans for next month, and I'm very much looking forward to it. Everything I've read from you on the VIAS delete tells me you've no regrets.
#16
Definitely worth the $40. The only time I notice the minimal low end loss is if I get caught at a weird speed where it is just past where it should downshift into a lower gear (like going 30 and it goes into 2nd and not 1st) but it is sort of like mimimal turbo lag because all of a sudden it starts to pull hard.
#18
Definitely worth the $40. The only time I notice the minimal low end loss is if I get caught at a weird speed where it is just past where it should downshift into a lower gear (like going 30 and it goes into 2nd and not 1st) but it is sort of like mimimal turbo lag because all of a sudden it starts to pull hard.
Hey Scott....I want to do this to my 02 (AT)....I know its been a bit since you've blocked the VIAS....do you have any long term input...in terms of gas mileage...did it eventually get better? worse? stayed the same?...and this loss of low end torque.....in your opinion....is the top end totally worth the loss in low end....is it really that noticeable?....Do you have the phenolic spacers?
By the way....I liked your analogy....kinda like turbo lag....lol.
thanks
Last edited by 2 GO B4; 04-18-2010 at 07:07 PM.
#19
I've had my plate for a few months now and have'nt installed it yet. My first excuse was because winter arrived and then I was thinking about the low end loss. Now that the weather is nice and I have a new gasket thanks to an Org member, I guess theres no more excuses. I must try and see how I feel about it as it's easily reversable if I don't like it.
#20
^^^ Yeah, I'd like to know your impressions too Scott... I just made my own aluminum block plate. Not as pretty as Aaron's from NWP, but it works the same. I'm not too sure what I think yet... don't know if the difference in top end that I'm feeling is all in my head or not I also THINK I feel a slight low end loss, but I don't know if that's in my head too... it's hard to tell. I have spacers as well, but I'd like to hear your long term impressions.
#22
#23
Definitely worth the $40. The only time I notice the minimal low end loss is if I get caught at a weird speed where it is just past where it should downshift into a lower gear (like going 30 and it goes into 2nd and not 1st) but it is sort of like mimimal turbo lag because all of a sudden it starts to pull hard.
#26
#27
Hey Scott....I want to do this to my 02 (AT)....I know its been a bit since you've blocked the VIAS....do you have any long term input...in terms of gas mileage...did it eventually get better? worse? stayed the same?...and this loss of low end torque.....in your opinion....is the top end totally worth the loss in low end....is it really that noticeable?....Do you have the phenolic spacers?
By the way....I liked your analogy....kinda like turbo lag....lol.
thanks
By the way....I liked your analogy....kinda like turbo lag....lol.
thanks
The top end gain is worth the touch of softness between 2800-3800 rpms, not to mention the transmission now automatically shifts around 6500 rpms when before it was around 6000-6200 rpms so it not only takes advantage of the top end gains, put puts you at a higher rpm in the next gear on the upshift. Still can spin the tires pretty hard off the line so the low end loss isn't that big. I'm expecting to get it all back whenever I do the intake spacers anyway.
#28
Mileage hasn't changed at all, still get 18-20 in mostly city driving (22.5 when I was in Phoenix due to significantly better light timing there) and the same 26-27 if I am all freeway. Those numbers are doing the actual math, trip computer shows 3-4 mpg better than those numbers. Actually had a 502 dte reading after a fill-up on my trip out to Phoenix.
The top end gain is worth the touch of softness between 2800-3800 rpms, not to mention the transmission now automatically shifts around 6500 rpms when before it was around 6000-6200 rpms so it not only takes advantage of the top end gains, put puts you at a higher rpm in the next gear on the upshift. Still can spin the tires pretty hard off the line so the low end loss isn't that big. I'm expecting to get it all back whenever I do the intake spacers anyway.
The top end gain is worth the touch of softness between 2800-3800 rpms, not to mention the transmission now automatically shifts around 6500 rpms when before it was around 6000-6200 rpms so it not only takes advantage of the top end gains, put puts you at a higher rpm in the next gear on the upshift. Still can spin the tires pretty hard off the line so the low end loss isn't that big. I'm expecting to get it all back whenever I do the intake spacers anyway.
I am looking forward to doing this mod....and I will post my thoughts up as soon as I do....Oh...one more thing Scott...did you disconnect the negative terminal of the battery when you did this....for the relearn?
thanks much
#30
Mileage hasn't changed at all, still get 18-20 in mostly city driving (22.5 when I was in Phoenix due to significantly better light timing there) and the same 26-27 if I am all freeway. Those numbers are doing the actual math, trip computer shows 3-4 mpg better than those numbers. Actually had a 502 dte reading after a fill-up on my trip out to Phoenix.
The top end gain is worth the touch of softness between 2800-3800 rpms, not to mention the transmission now automatically shifts around 6500 rpms when before it was around 6000-6200 rpms so it not only takes advantage of the top end gains, put puts you at a higher rpm in the next gear on the upshift. Still can spin the tires pretty hard off the line so the low end loss isn't that big. I'm expecting to get it all back whenever I do the intake spacers anyway.
The top end gain is worth the touch of softness between 2800-3800 rpms, not to mention the transmission now automatically shifts around 6500 rpms when before it was around 6000-6200 rpms so it not only takes advantage of the top end gains, put puts you at a higher rpm in the next gear on the upshift. Still can spin the tires pretty hard off the line so the low end loss isn't that big. I'm expecting to get it all back whenever I do the intake spacers anyway.
#31
#33
Un-metered air in upper intake, even that small can impact performance. PLUG IT.
As for the solenoid:
Capping it makes it think it's still under pressure and connected to UIM. PLUG IT
As for canister:
IMHO - If your not using it then why leave it?
#35
okay....on the NWP website...the pictures of the block plate only show one nipple plug.....do you get one or two with the kit???
#36
#37
#40
Search Results for “vacuum cap” @ online parts stores. Example:
http://shop.advanceautoparts.com/web...erm=vacuum+cap