Not boosting properly
08-06-03, 10:27 AM
#1
haiO
Thread Starter
Join Date: May 2002
Location: mmsports.org
Posts: 550
Likes: 0
Received 0 Likes
on
0 Posts
Not boosting properly
I'm about to buy this car and i need a question answered first.
It's a 90 TII... this is what happens.
I turn it on, the boost gauge drops to the far negatives (indicating good vacuum?)
I gas it and when it's supposed to be at full boost, the gauge reads like 10mmHg.
The turbo has 124k on it... what does this mean???
It's a 90 TII... this is what happens.
I turn it on, the boost gauge drops to the far negatives (indicating good vacuum?)
I gas it and when it's supposed to be at full boost, the gauge reads like 10mmHg.
The turbo has 124k on it... what does this mean???
08-06-03, 10:48 AM
#2
Full Member
Join Date: Mar 2002
Location: 415 -> 707
Posts: 174
Likes: 0
Received 0 Likes
on
0 Posts
Boost Guage
The stock boost guage sucks. But if its accurate 10mmG should mean about 14lbs of boost which doesn't sound accurate to me on a stock turbo.
If its stock that is.....
If its stock that is.....
08-06-03, 11:09 AM
#3
haiO
Thread Starter
Join Date: May 2002
Location: mmsports.org
Posts: 550
Likes: 0
Received 0 Likes
on
0 Posts
um.... no... the stock boost guage goes up to 45x10 mmHg... i think you got something backwards..
new NEWS: I just filled the car with decent gas, as it was running low on fuel... (about a 1/4 tank left) and now the boost reads to about 25mmHg under full throttle... maybe I should siphen the whole tank out and fill it all with premium... hmmmm
any opinions?
new NEWS: I just filled the car with decent gas, as it was running low on fuel... (about a 1/4 tank left) and now the boost reads to about 25mmHg under full throttle... maybe I should siphen the whole tank out and fill it all with premium... hmmmm
any opinions?
08-06-03, 11:09 AM
#4
Yar-Har-Har
Join Date: Sep 2002
Location: Nashville, 37217
Posts: 1,954
Likes: 0
Received 0 Likes
on
0 Posts
slap an aftermarket on there...you dont have to mount it if your just trying to get a good boost reading....then it will tell you what is really up....
and if you get the car, then you already have a boost guage to attach
and if you get the car, then you already have a boost guage to attach
08-06-03, 12:19 PM
#6
Yar-Har-Har
Join Date: Sep 2002
Location: Nashville, 37217
Posts: 1,954
Likes: 0
Received 0 Likes
on
0 Posts
if its a turbo you need to run premium PERIOD...
nothing less than 93.....so they say.....it needs higher octane tthough, that is for sure....gas is not a place to budget your money
nothing less than 93.....so they say.....it needs higher octane tthough, that is for sure....gas is not a place to budget your money
Trending Topics
08-08-03, 02:06 AM
#10
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
I don't get why everyone has trouble with the boost gauge's units. It's written right there on the gauge! x10 mmHg
So full scale "45" is 450mmHg = 8.7psi
"10" is 100mm = ~2psi
Either the gauge is dodgy or sometihng is causing low boost. Usually this is clogged cats or air filter.
Besides, troubleshooting should be done with a proper boost gauge, not the dash one. Don't buy the car until you can verify it's making full boost, or you diagnosis the cause of the low boost and negotiate from there.
So full scale "45" is 450mmHg = 8.7psi
"10" is 100mm = ~2psi
Either the gauge is dodgy or sometihng is causing low boost. Usually this is clogged cats or air filter.
Besides, troubleshooting should be done with a proper boost gauge, not the dash one. Don't buy the car until you can verify it's making full boost, or you diagnosis the cause of the low boost and negotiate from there.
Thread
Thread Starter
Forum
Replies
Last Post
24seven_dada
3rd Generation Specific (1993-2002)
20
11-10-18 12:03 PM
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM