Problems with Boost gauge

[4geze63]

I had my boost/a/f and egt gauges installed today.

Prior to this I only had 1 single boost gauge that was mechanical. It would read -18vac at idle and on my new boost gauge (electrical) it reads 2 psi of boost at idle and upon decceleration only gets to -5 vac and I have no idea where the boost begin...

The mechanic said it was possibly something todo with a map sensor or something. I had the exact boost gauge installed in my last car and it worked fine.

This pisses me off becuase I also had a problems with my egt gauge expressed in another thread.

The shop that installed them has always done good work for me before me but now Im kinda dissapointed in the install of my gauges because my egt and boost dont even read close to correct.


Im going back tomorrow

 

[RLx02]

it looks like i'm having the same problem...at idle its 20 vac and when I rev it, it goes to 0 psi of boost....

 

[noz]

it looks like i'm having the same problem...at idle its 20 vac and when I rev it, it goes to 0 psi of boost....

no. yours seems fine.

 

[SinEclipse]

RLx02 your is reading correctly since mine at idle reads from -15 to -20 vac and when i drive around and hit boost it would read a steady 14psi. if you rev it in neutral it will not go pass 0psi

 

[RLx02]

no. yours seems fine.

yeah. I was wondering wtf was wrong with it until I took it for a spin...sorta forgot that you need to build up boost...

just gotta mount the bi*** now.

whats stock psi? I have my hallman mbc turned up to about 14psi

 

[krazywhitboy]

wow, why are you having someone install your gauges for you?

i'm betting that the hard line that connects the gauges to a vac source is pinched somewhere giving an inaccurate reading. or the person you had install your gauges didn't tap the line into a vac/boost source...

 

[SinEclipse]

stock boost is around 13-14 psi. i am at a steady 14psi with the stock turbo

 

[Defiant]

The mechanic said it was possibly something todo with a map sensor or something. I had the exact boost gauge installed in my last car and it worked fine.

Your mechanic is a simp. He installed the line on the wrong vac line, or kinked it. Or, both.

 

[RLx02]

stock boost is around 13-14 psi. i am at a steady 14psi with the stock turbo

...hrm...14 psi stock really? I have the hallman cranked up a bit...i'll see if i can push 15-16psi today.

it sure feels faster than it was stock?

 

[4geze63]

Your mechanic is a simp. He installed the line on the wrong vac line, or kinked it. Or, both.

it was installed in in the same place as the prior mechanic gauge, no kinks

 

[SinEclipse]

well i run a 14psi on my car with some mods which is in my profile. i was even suprise it was steady and not having boost creep or anything

 

[Defiant]

it was installed in in the same place as the prior mechanic gauge, no kinks

Evidence-at-hand to the contrary, apparently.