2G newbie questions!

[XiKeiyaZI]

So I have myself a 2G now, and I'm not too familiar with it, so I'd like to ask a few questions and see what I can get out of it.

My mods are listed in my profile. So don't ask " what's done to it "

1 : It seems to be running a tad Lean.
2 : When accelerating under boost, it misses.
3 : It has a SOMEWHAT rough idle.

I pulled the plugs and they are all burning just a little lean. Not bad or damaging, but just enough to burn on the hot side. Infact, it was hot enough to warp the boot on #2 plug wire. The engine itself doesn't run hot, however. 2 Hours of driving and never above the mid-mark.

Any thoughts? Again, check profile for mods.

Just confirmed (compression test) - 160 Across the Board.

 

[Bluefire16]

First, you dont "actually" no if you are running lean because you dont have a wideband or any tool to check. You cant tottally go off spark plugs, but they can help give a general idea.

Second, possible boost leak or a couple has a crack in it, it will hold x amount of psi fine, but once you get higher up then leaks.

Third, sounds like bad wires or improperly gapped plugs. Try replace those and gap to .028

 

[XiKeiyaZI]

First, you dont "actually" no if you are running lean because you dont have a wideband or any tool to check. You cant tottally go off spark plugs, but they can help give a general idea.

Right you are. But just by the way it's acting and the plug looked, it was just a tid-bit too lean.

I just got new plugs, 6's of course. Gapped to .028. I first, however, ran Seafoam through it and the gas along with letting about a cap and a half full sit in the piston chambers for about 5 minutes. It smoked Soooo bad. Now she's running a LOT better. Still misses a bit though.

I was able to confirm that the exhaust manifold has one leak where one of the studs is loose. Gonna try to fix that, but I don't think that it's causing the miss...just reducing spool up time. I also have a CEL, and was told by the previous owner that the Rear O2 sensor was going bad. Gonna check that tomorrow.

I'll be ceramic coating the Exhaust manifold tomorrow and fixing that exhaust stud. Gonna make a BETTER boost leak tester, and see if I can get it all lined out.

Is there a way to set the ignition timing on a 2G? o_o

 

[XiKeiyaZI]

What would Backfiring on Decel point to?

 

[kidtsi]

Right you are. But just by the way it's acting and the plug looked, it was just a tid-bit too lean.

I just got new plugs, 6's of course. Gapped to .028. I first, however, ran Seafoam through it and the gas along with letting about a cap and a half full sit in the piston chambers for about 5 minutes. It smoked Soooo bad. Now she's running a LOT better. Still misses a bit though.

I was able to confirm that the exhaust manifold has one leak where one of the studs is loose. Gonna try to fix that, but I don't think that it's causing the miss...just reducing spool up time. I also have a CEL, and was told by the previous owner that the Rear O2 sensor was going bad. Gonna check that tomorrow.

I'll be ceramic coating the Exhaust manifold tomorrow and fixing that exhaust stud. Gonna make a BETTER boost leak tester, and see if I can get it all lined out.

Is there a way to set the ignition timing on a 2G? o_o

fix the leak and go from there.

 

[97-gst]

Is there a way to set the ignition timing on a 2G? o_o

dsmlink

 

[XiKeiyaZI]

Hm...If only I had it...

 

[GsXdSmKingGsX]

You need a A/F wideband guage

 

[dsmdeliveryboy]

What would Backfiring on Decel point to?

Backfire on deceleration is usually caused by the car being lean, having boost leaks and plugs that aren't gapped properly will cause this. Also, check your MAS to make sure all the honeycombs are there. And post some pics of this thing!

 

[XiKeiyaZI]

I figure it's got boost leaks. I went and bought a new coupler piece for mine today.

I'll be removing the manifold and such today and making sure all is clean. Wish I had some piping to put my mid-sized FMIC on.. =/

Also going to get some interior work done and install a damned Radio. Haha

I'll post pics here shortly!!

 

[dsmdeliveryboy]

I figure it's got boost leaks. I went and bought a new coupler piece for mine today.

I'll be removing the manifold and such today and making sure all is clean. Wish I had some piping to put my mid-sized FMIC on.. =/

Also going to get some interior work done and install a damned Radio. Haha

I'll post pics here shortly!!

Awesome, can't wait to see them

 

[XiKeiyaZI]

Haha. It's a little rough. ;P I'll have her back up to 100% before it starts getting cold.

Another quick question. Disregard my lack of knowledge on 2Gs...

Apparently the PO thinks that the CAT was gutted. Would that cause a CEL in these Cars?

 

[dsmdeliveryboy]

Haha. It's a little rough. ;P I'll have her back up to 100% before it starts getting cold.

Another quick question. Disregard my lack of knowledge on 2Gs...

Apparently the PO thinks that the CAT was gutted. Would that cause a CEL in these Cars?

Yes it would as 2G's are OBD2 and 1G's are OBD1, what you do is buy 2 spark plug foulers and screw them together and screw them into the bung and then screw your sensor into the foulers. It tricks the ECU into thinking there is a cat. Also, if the boost control solenoid is unhooked it will throw a CEL.

 

[XiKeiyaZI]

Ooooh. Those wouldn't cause air/fuel differences would they? Such as the ECU is reading too much air at the rear 02 and is pulling air?

 

[dsmdeliveryboy]

Ooooh. Those wouldn't cause air/fuel differences would they? Such as the ECU is reading too much air at the rear 02 and is pulling air?

Nope, you can also try this method but it seems like much more of a PITA IMO
O2 sensor bypass

 

[XiKeiyaZI]

Yeah...Think I'll either replace it or leave it be.

ust made a new gasket for the J-Pipe. Installing a good MBC. The old one that was on it was made incorrectly. There are a few wires that I have no damned idea what they are for.. as well as the Boost Control Solenoid is gone.. Hello CEL.. -.-;

...

I just looked under the car and noticed a loose hose. Pulled it down. EVERY vaccum hose for the car fell to the ground.

WTF.. @____@ Emissions delete in progress....

 

[dsmdeliveryboy]

Wtf? Vacuum lines will cause CEL's too

 

[XiKeiyaZI]

So, I did a full emission delete. Removed the Charcoal canister, coated the exhaust manifold in ceramic, about 4 layers, tightened down all clamps, cleaned out the charge piping, and plugged one of the lines that goes into the intake snorkel as it was only pulling in unmetered air.

I got everything tightened down save for one stripped bolt on the exhaust manifold. Installed a Lower timing cover, though it was for a 1G so I had to modify it a bit to make it work. Got all of my belts on correctly.. though one is still a tad bit loose...haven't tried to see if it squeals with the AC on.

I ran it at stock boost. It ran GREAT. Had a whistling noise though.. turned out that I forgot to tighten down the jpipe. Tightened it and it solved the issue. Car pulled HARD. I then installed my MBC and turned it up to about 12PSI...Pulls like a mule! Needless to say, it's quicker than it was yesterday. No smoke, no stumble... but there is a LITTLE bit of miss on hard deceleration still.

Also... my CEL goes away if I unplug a random Solenoid from behind the intake manifold. If I plug it up, then I get a CEL. >>

 

[XiKeiyaZI]

I'm still getting the little bit of miss-fire under decel. =/ Sounds annoying..not horrible though. But with the folgers-sized exhaust on it, it echos. Now... I was able to confirm that the exhaust is 'new' as it's all mostly been replaced with 3' straight pipe. The CAT, I haven't been able to confirm as being gutted...but I suppose I could drop that and check.

I lowered the idle via the BISS screw...car dosn't seem to like that at allll. it has to 'warm up' before you can give it any gas. Otherwise the idle dips and then it picks up. Once it has a few minutes it runs fine. Gonna adjust the TB a bit and see what I can do.

The interior has yet to be worked over. Every-time I turn on the AC (I LOVE AC) it smells like Black -N- Mild Cigars... which isn't horrible but still... I still need to vaccum it out, install my stereo system.. and adjust the drivers-side door/hinge as it's about 1/4inch too low and kindly hits it a bit off centered causing an annoying 'boom!' when you shut the door. =/

Also, is there anything that I can use besides actual intercooling piping to make a piping layout for my FMIC? I got the damned thing for free...might as well use it right?

 

[1gdsmftw]

look on ebay...there is a kit for the 2g for about 80 bucks and its claimed as a full piping kit minus intercooler and its a 2.5 inch piping which is ideal since your ic is a 2.5 inch diameter for short route....

and yeah...when i got that car i did as much cleaning out of that smell...it was worse when i got it...burned the crap out of my eyes...i threw some fabric softener pads under the seats to try and null the smell...maybe throw something in the vents to make it smell better?

 

[XiKeiyaZI]

Well, I've found the lean condition.. now it's just finding the damned exhaust leak. >.< Car is quick as hell but I don't like the sound of leaking exhaust.

 

[1gdsmftw]

check the exhaust manifold...that dnp is really tricky to get bolted just right to the turbo it might be crooked....dont blame me i didnt put it on buddy who gave it to me put it on for me...his words were...its tricky as hell to get it right...so i said hell do it for me then and he did so yeah check that

 

[XiKeiyaZI]

Got the Manifold/Turbo on correctly. I ran the car and let it get nice and warm. I was able to tighten down the bolts more this way, while keeping in mind that bolts and sure are more easily broken this way. I could audibly hear the car straighten up as I tightened them. Was pretty enjoyable.

EGR was wide open and corroded over with tons of buildup...not blocked off or unplugged. I created a several ply layer of aluminum can, sealed them together, and put the EGR over it and tightened it down. Car likes this more. I'll replace with a proper plate asap.

Vacuum is only right above 10 at idle. It was 8-10. Now it's 11-14. I feel this could be better but I don't know where to start...I guess a can of starter fluid?

When taking off from first, there's something rubbing or shuddering in the engine bay. Sounds/feels like either a tire rubbing or the clutch slipping.

Car's boost is kinda laggy. You can take off in first.. and the car will act like it has little power.. then at about 2.8K the boost takes hold and off you go. Same for second. Even at WOT, car doesn't start to pull until well after 2.5K. 3rd it picks up immediately.

 

[summerisway2hot]

Car's boost is kinda laggy. You can take off in first.. and the car will act like it has little power.. then at about 2.8K the boost takes hold and off you go. Same for second. Even at WOT, car doesn't start to pull until well after 2.5K. 3rd it picks up immediately.

Hate to break it to you, but that's the way a turbo car acts, if you want the boost you gotta work for it by keeping on the shifter...

 

[XiKeiyaZI]

o.- I've owned a boosted car before. Infact, the one before this one was a 90' GSX which spooled up much sooner than this one.

Thanks for the obvious.