View Poll Results: Vacuum level at warm idle
12-13
5
8.06%
14-15
5
8.06%
15-16
16
25.81%
17-18
20
32.26%
19-20+
16
25.81%
Voters: 62. You may not vote on this poll
Vacuum level at warm idle
06-11-2009, 03:46 PM
#31
Addict
Rennlist Member
Rennlist Member
I was just out playing with the car and had a thought come to me.
I think that the throttle stop may be adjusted too far closed... and that could be causing my low vac and possibly my hesitation going from vac to throttle. It makes sense if you think about it
So I will need to adjust the trhottle stop to a point where it is slightly further open, then adjust the TPS to that point as well. If my throttle is sitting too far closed on vac, could that cause the minute hesitation going to WOT?
I think that the throttle stop may be adjusted too far closed... and that could be causing my low vac and possibly my hesitation going from vac to throttle. It makes sense if you think about it
So I will need to adjust the trhottle stop to a point where it is slightly further open, then adjust the TPS to that point as well. If my throttle is sitting too far closed on vac, could that cause the minute hesitation going to WOT?
06-11-2009, 03:49 PM
#32
The Impaler
Rennlist Member
Rennlist Member
Thread Starter
Just the click test?
It clicks properly. What is a common malfunction for the TPS?
I have noticed that while datalogging, even the smallest amount of throttle shows up as WOT. I have just assumed that the zt-2 cannot properly read the voltage for our TPS sensors.
It clicks properly. What is a common malfunction for the TPS?
I have noticed that while datalogging, even the smallest amount of throttle shows up as WOT. I have just assumed that the zt-2 cannot properly read the voltage for our TPS sensors.
07-05-2009, 04:15 PM
#33
Burning Brakes
19-21" idle vacuum at operating temp, up to 30" on decel. Measured with a 5" face pressure gauge significant to .5 psi...recently calibrated at STP so you know it ain't lyin'.
1986 951 with the venturi business all still there.
1986 951 with the venturi business all still there.
07-05-2009, 05:02 PM
#34
Addict
Rennlist Member
Rennlist Member
The TPS input on the ZT should go to KLR pin 22, and it will read.
07-05-2009, 06:02 PM
#35
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
If you're at 1,200 ft the max vacuum you could get can easily drop off 1 or 2 inhg; so you're not really comparing to the 20 inch guys.
Also what is your engine speed at idle? Once you go below the 850 - 900 RPM mark, vacuum drops off quickly, even if everything is healthy.
Also what is your engine speed at idle? Once you go below the 850 - 900 RPM mark, vacuum drops off quickly, even if everything is healthy.
07-05-2009, 07:25 PM
#36
Nordschleife Master
stock? I believe, only changes I have done are new vacuum lines and Laust 5 port vacuum manifold, 16.7 verified on Zietronix... 20.9 cold...
Soon to have Scivision MAF, MaxHP chips, LR MBC, hopefully a MV-S WG, will post new vacuum readings once all mods are in place...
Soon to have Scivision MAF, MaxHP chips, LR MBC, hopefully a MV-S WG, will post new vacuum readings once all mods are in place...
