manny34711

I just got my boost gauge and I think i hooked it up right. Anyway, when I turn my car on, it was at like -22 (by negative i mean the VAC side) then when I started driving it went to about -8. When I drove it hard it was around 0-5psi. I know it sounds confusing...

I know the pattern supposed to be 10-8-10 but my pattern was all screwed up... i dont think i can call it a pattern. I dont know if I hooked it up right or what...

Check out the pics, it shows how i installed it.

***IF YOU'RE NOT GOING TO MAKE A HELPFUL POST DONT EVEN BOTHER POSTING... SERIOUSLY!***

***I'm not making a post such as "where do i connect the hose to...." or "how do i read my gauge..." etc... instead of flaming me go waste your time and flame them.

Thanks again for the helpzzzz

btw if u need some info, its an autometer sportcomp and its the 3301 if you want to look it up.

thanks again!

manny34711

http://www.claninev.com/downloads/000_0022.jpg
http://www.claninev.com/downloads/000_0024.jpg
http://www.claninev.com/downloads/000_0025.jpg

manny34711

bump

btw, does the car have to be like FULLY warm in order to read an accurate boost lvl? my car was not really fully warmed.

manny34711

ok in other words, when idling, i was at like 20-22In.HG, when driving normally i was at like 10-15In.Hg. When I drove it hard (not fully warmed) it was like 0-5psi. I'm pretty sure its wrong because my friend (JanusSolSummons in the forums) drove in my FD and when I did take him for a ride he told me the boost felt just about right. What is wrong!?!?!!?! I've been sitting here searching, EVEN GOOGLE!

Mahjik

iTrader: (1)

What rpm does your car idle it?

The idle vacuum reading seems about right (depending on your idle rpm). As far as the boost, the FIRST thing you need to do is a proper boost test:

http://www.scuderiaciriani.com/rx7/boost_test.html

Just find a nice stretch of open road/highway and take 3rd gear WOT up to around 6000 rpms. Your boost pattern starts once the gauge moves out of vacuum and to 0 before boost.

manny34711

my car idles around 850-1000

manny34711

did i install the gauge right?

Mahjik

iTrader: (1)

If you are around 1000, then the idle vacuum seems good.

Yea, it looks fine. Most people don't use that much of the plastic tubing. I only used the plastic tubing from inside the cockpit until it reached the engine bay. Once inside te engine bay, the rest was vacuum tubing.

Do the boost test and post back your results of the boost pattern.

manny34711

thanks again magjik, ill try it tomorrow morning and then post it. but yeah its strange that the car feels like it is boosting right but it was only getting like 5psi at the max, and i got the rpm's to about 6k

WaLieN

Don't boost your car before it's warmed up. Get to a straight road, where you're going ~35mph in 3rd gear, punch it to redline. Monitor the boost at 3000rpm/4500RPM/~6,000rpm, and that will give your boost pattern. We need your boost pattern before we can really tell you anything.

manny34711

Ok I just finished doign the test. Believe it or not, my pattern was pretty much 7-7-7. I was on a nice straight road, got to 3rd year... floored it and at 3k RPM it was 7, at 4.5k it was 7, then at 6k it was 7 also. Hrmmmmm.....

Mahjik

iTrader: (1)

Check the two solenoids on the front of the UIM. Try switching the connections and see if that changes anything. If not, put them back then check for the boost pills:

https://www.rx7club.com/showthread.p...ht=boost+pills

manny34711

The car has 90k original miles, I do have an exhaust leak somewhere by the turbo/manifold (could that be it???) I did have a vacuum hose leak which made my car idle at 1500RPM's but I believe I fixed it because now my car idles anywhere from 850-1000 (its pretty random) but when the car is fully warm it idles at about 1100 when not in gear, and about 900 when I am in gear. Hope some of that info helped, thanks!

MANNY

manny34711

also, I tried the thing that you idle then WOT and it should go to 4psi... mine went like 0-2psi.

Mahjik

iTrader: (1)

Take one thing at a time. Check the post I did above and get your driving boost pattern working properly first.

areXseven

iTrader: (1)

A stock 13B-REW should idle around 750 rpm with A/C off. A simple fix (fingers crossed) would be to adjust the idle screw (counter clockwise turns the idle down/lower,..(?)

Regarding your boost issues,..first do as Mahjik suggested, then rule-out IC pipe/Intake pipe boost leak.

Good Luck.

manny34711

ima try them now brb

JaNusSolSumnus

These are the lines that contain the boost pills, you'll have to remove your intake to access them.


Here are the two solenoids Mahjik spoke of, you can tell which connector goes to whict solenoid as one will have a white 'marker' on it. This marking can sometimes get worn off though and can make it hard to tell which connector goes where.


Only try one solution at a time... trying multiple things may counter-act the proper solution.
~Kris

manny34711

ok i look at the 2 hoses that are side by side which contain the pills in them... well as im looking i dont see ANYTHING in the hoses....

areXseven

iTrader: (1)

The pills may be hard to see from the end of the hose. Pinch the hose with your thumb/index finger and try to "feel them".

manny34711

all i see are 2 indents inside them

manny34711

yeah i did and theres nothing hard in there at all.. theres just 1 indent inside each end from the nipples

areXseven

iTrader: (1)

Do a search for "boost pills". I think you can replace them with certain sized carb jets sold at Pepboys or AutoZone.

manny34711

i checked the longer cable too, and its the same... nothing inside the ends of the hoses. just an indent from the round tip of the nipple

manny34711

ok thanks, ill look up the carb jet size. so no pills can cause low boost?