 boost guage install |
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  Mar 30 2005, 11:19 PM
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#1
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 Eats and sleeps DSM jargin.  Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314  |
the TSI I got has a boost guage in it but it is not working right. it shows vac. but when I am pulling boost the needle stops at zero. I know nothing about turbo charged cars this is my first one?
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Mar 30 2005, 11:56 PM
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#2
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
Is it the factory one in the gauge cluster or is it aftermarket?
-------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Mar 31 2005, 04:57 AM
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#3
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Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
aftermarket
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Mar 31 2005, 06:52 AM
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#4
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 Post Master Group: Members Posts: 908 Joined: 7-October 03 From: Chillicothe, IL Member No.: 182 |
Typicly you T the boost guage source line to the line going to your fuel pressure regulator.
-------------------- GVR4 866/1000 = the perpetually broken car
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Mar 31 2005, 07:00 AM
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#5
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 Post Master Group: Members Posts: 774 Joined: 28-October 02 From: Pekin Member No.: 32 |
I ran it off the same place I installed the gauge on my GST. It sometimes works when it's first started, and then will only read vac. Kinda goofy. I bought it used, but the fact that it is a mechanical gauge and it does work sometimes makes me think it has something to do with the boost signal at the fpr.
Bob, try changing the signal point. Remove the "T" from the fpr and extend it to the BOV line, and see if that works. -------------------- 2009 Scion Tc
1994 Del Sol Si 1991 Talon TSi AWD 1990 Mustang GT FOR SALE!!! |
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Mar 31 2005, 08:36 AM
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#6
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 Zen Master DSM Group: Moderators Posts: 3,008 Joined: 10-January 01 From: in front of you Member No.: 5 |
If your fpr isn't getting a correct boost signal, that's not a good thing either. Its rising rate to keep the boost pressure and fuel pressure at a constant offset from each other. If your fuel pressure doesn't go up when your boost pressure goes up, you'll be getting less fuel than you should and a poor injector spray pattern. If you get a good reading from that guage somewhere else, I'd definitely look for boost leaks in the vacuum lines.
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Mar 31 2005, 05:50 PM
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#7
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Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
QUOTE (natedogg @ Mar 31 2005, 08:36 AM) If your fpr isn't getting a correct boost signal, that's not a good thing either. Its rising rate to keep the boost pressure and fuel pressure at a constant offset from each other. If your fuel pressure doesn't go up when your boost pressure goes up, you'll be getting less fuel than you should and a poor injector spray pattern. If you get a good reading from that guage somewhere else, I'd definitely look for boost leaks in the vacuum lines. would this cause the engine to cut out under full boost? -------------------- ┌∩┐(◣_◢)┌∩┐
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Mar 31 2005, 06:55 PM
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#8
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
a lack of a rising rate in fuel pressure would probably feel like fuel cut.....Yes it would feel like the engine cutting out under WOT
-------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Mar 31 2005, 07:02 PM
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#9
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Post Master Group: Members Posts: 774 Joined: 28-October 02 From: Pekin Member No.: 32 |
I'm more inclined to believe it is an issue with the gauge. I experienced both spark blowout and fuel cut in that car, but never and unexplained misfire. However, things happen, and I suppose the boost lines could have gotten a crack or leak.
-------------------- 2009 Scion Tc
1994 Del Sol Si 1991 Talon TSi AWD 1990 Mustang GT FOR SALE!!! |
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Mar 31 2005, 11:24 PM
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#10
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Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
DSM's gotta love em
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Apr 2 2005, 08:04 PM
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#11
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Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
I am now on my 2nd boost gauge and this one won't read boost either. I can't find any leaks in the line any were I have got some new hose to install. but the main problem is the engine cutting out under full boost it's getting worst could the fuel pressure regulator be bad and causing both problems or are they not related?
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Apr 2 2005, 08:27 PM
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#12
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Post Master Group: Members Posts: 908 Joined: 7-October 03 From: Chillicothe, IL Member No.: 182 |
That means you are not boosting. You probably have a MASSIVE boost leak.
-------------------- GVR4 866/1000 = the perpetually broken car
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Apr 2 2005, 09:26 PM
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#13
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Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
now the car is sputtering at normal speeds if it makes it to normal speeds, has a rough idle and it bogs down when you step on the gas from a stop.
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Apr 2 2005, 09:28 PM
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#14
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Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
QUOTE (ncgalant @ Apr 2 2005, 08:27 PM) That means you are not boosting. You probably have a MASSIVE boost leak. i'm boosting you can feel the turbo when it spools -------------------- ┌∩┐(◣_◢)┌∩┐
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Apr 2 2005, 10:32 PM
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#15
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
Boost is positive manifold pressure. If the boost gauge is hooked up correctly and still shows only vaccum (i.e. negative manifold pressure) you are not "boosting". Have someone help you look for boost leaks (intake leaks) as that is more than likely the cause. Just because you can hear the turbo doesn't mean it's "boosting".
-------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 2 2005, 10:38 PM
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#16
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Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
Which line does it get hooked up to, the one going to the fuel to rail or the one going to the manifold
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Apr 2 2005, 11:43 PM
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#17
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Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
I think I found the cause of the engine cutting out I have a dead plug wire going to get new ones tomarrow
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Apr 3 2005, 08:17 AM
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#18
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
^^^good idea to get spark plugs with those as well. Most people reccomend NGK wires and plugs and Eagle (Chrysler) reccomends Champion brand. I'd go with the NGKs.
-------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Apr 3 2005, 11:49 AM
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#19
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Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
what should I gap my new plugs at?
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Apr 3 2005, 09:09 PM
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#20
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Eats and sleeps DSM jargin. Group: Members Posts: 1,754 Joined: 25-June 04 From: 61554 Member No.: 314 |
ok installed the new plugs and wires and found it to be my coil pack and still havent fix the boost gauge
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