1997 Gs-T Help

spyder9789 · #1 05-20-2007, 10:39 PM

Okay, this is the situation. I recently got rid of my 97 eclipse Gs for a Gst. It was an even swap so I couldn't pass it up. The car was a virgin it was babied all its life and was never modified. It had a few "small" problems. So I thought it would be a great project car. Anyways the second gear is real touchy so i bought 1 qt. of redline heavy shockproof and 2 qt. of redline mtl and maybe that will fix that. My boost would cut out at 4500 rpm. I replaced the factory intake with an aftermarket one, when i did the vacuum hose that connected the BOV to the intake didn't fit properly so we ran it without it. Now that the BOV was venting to the atmosphere the boost worked almost perfect but it idled like crap. I'm thinking about using a MAF Translator so it will idle if that'll work. But that still leaves a unfiltered hole on the intake where the hose used to be. I put tape over the hole but stopping it up made the boost cut out again and the car started jerking every now and then. So then I tried to put a cloth over it for the time being so it would still pull in air but even that messed it up so what should I do about that. The car is also running rich and gets horrible gas mileage like 15 mpg. If anyone could help me out I would greatly appreciate it.

And please no smart a** answers like sell it and buy a rear wheel drive.

smoke121212 · #2 05-20-2007, 10:54 PM

first of all, welcome to the forum. Secondly, i assure you no one here is gonna tell you to sell it and buy a rwd car so dont worry about that. I cant exactly figure out your problem, if you could post a pic mabey i could get a better idea. Although without a pic you will get a lot of responses, alot of the people here know a lot more than me.

PS. please post in the correct sub-forums.

crunchymilk55 · #3 05-20-2007, 11:54 PM

are you serious? You are drawing in unmetered air and you're wondering why your car is running like shit???

maybe it's your tire pressure!

smoke121212 · #4 05-20-2007, 11:58 PM

lol!!!! c,mon dude give em a break. lol

spyder9789 · #5 05-21-2007, 12:01 AM

I know that is why the idle is out of whack, could it be running rich because it isnt getting enough air in for the air/fuel mixture. If so could a MAF Translator fix the problem?

Blackcrow64 · #6 05-21-2007, 12:57 AM

Quote:

Originally Posted by spyder9789

And please no smart a** answers like sell it and buy a rear wheel drive.

A rear wheel drive DSM?...

I think you meant to say an AWD DSM... lol

crunchymilk55 · #7 05-21-2007, 12:59 AM

your fuel trims are out of control. Running rich/lean, whatever, you can't diagnose it until you fix that. The ecu can do crazy things to try and correct any fuel trim errors.

It's probably a boost leak, a large one. The correct way to fix your problem is to
1. "tune" the BOV, I've described in detail how to do this before, search for it
2. plumb the BOV outlet back into the intake, if it won't fit your new intake, then put your old one back on.
3. run a boost leak test and fix the problems

The expensive and useless way is to buy a GM maf / translator (expensive) and to redo your upper intercooler pipe so that you can insert the new parts into there.

It's a no brainer...

steviek · #8 05-21-2007, 01:33 PM

Quote:

Originally Posted by crunchymilk55

your fuel trims are out of control. Running rich/lean, whatever, you can't diagnose it until you fix that. The ecu can do crazy things to try and correct any fuel trim errors.

It's probably a boost leak, a large one. The correct way to fix your problem is to
1. "tune" the BOV, I've described in detail how to do this before, search for it
2. plumb the BOV outlet back into the intake, if it won't fit your new intake, then put your old one back on.
3. run a boost leak test and fix the problems

The expensive and useless way is to buy a GM maf / translator (expensive) and to redo your upper intercooler pipe so that you can insert the new parts into there.

It's a no brainer...

but maft lets you vent to atmosphere

oh wait he's already doing that.

spyder9789 · #9 05-21-2007, 05:40 PM

i did connect the hose from the intake to the BOV anyways even though it was hard to make it fit and it still did the same problem with the boost as it did before so that wont fix it

gsxeclipse97 · #10 05-21-2007, 10:10 PM

you need to connect that hose or you will have this problem there is no way around it unless you buy an after market bov and tighten it down not to leak or put that tube back on...

there is no point in trying to vent unless you are going to do it right. My bov is recirculalted and its quite loud. Its a greddy type s.

spyderturbo007 · #11 05-22-2007, 08:12 AM

Alright, at least you aren't venting anymore. As for your problem, you need to explain what you mean by "cut out". What does your boost gauge tell you when that happens? Have you done a leak check? You aren't running platinum or iridium plugs are you? Do you have a way to monitor your O2 voltage? I'm asking about the front O2 because you said that your gas mileage sucked.

Mikelb · #12 05-22-2007, 11:19 AM

Iridium plugs would work in a DSM (not ideal, but it's what I used to run)...

have you tried plugging in another MAF? your's might not be working properly

Are all of your other vacuum hoses hooked up???
When your boost "cuts out" does it feel like you hit a brick wall? (if so, look up fuel cut)

And like everyone else has said, NO Venting BOV unless you spend $$$ to do it right... Make sure that you have no nipples open, or cracked hoses, any leak in the intake will cause your car to do funny things... (look up boost leak, VFAQ has a writeup on how to make a boost leak tester)

When you get on the gas, does your car blow black smoke???(if so, refer to the comment above^, it'll be a boost leak... and that'll cause fuel cut...)

P.S.-Subforums (this should be under "Problem Diagnosis")

spyder9789 · #13 05-23-2007, 08:13 PM

The check engine light did come on and it said fuel trim bank 2, how would you fix that and as for the "cutting out" with the turbo spooled at 4500 rpm it feels like hitting the brakes lightly and the gauge says that it's still spooling all the way. It also blows black smoke when shifting.

Black99GST · #14 05-24-2007, 03:21 AM

all turbo cars blow black smoke when shifting... get a new vac line to fit the BOV to Manifold, and then

for trying a new MAFT, yours is probably FU*KED! also, do the boost leak test! (its worth every second you spend doing it)

EDIT: Do it in this order:
1) Vac line from BOV to Intake Manifold
2) Boost Leak Test
*you'll probably find the problem by now*
3) New MAFT (Blow-through setup if you must insist!)

hicks10 · #15 05-24-2007, 01:10 PM

ok y dont u just go to the hardware store and buy a rubber cap/plug to put over the whole on ur intake and that will take care of it idleing like shit, and u dont need to have the BOV route back into the intake it does nothing.

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