The Project Pad

Runs better in what aspect? With everything sealed up have you tried adjusting the idle via the screw?

Check if metering plate is stuck. Should not run at all with mm hose off.

Metering plate moves but is very, how do I say it, slows as if it is moving fluid. I assume this is due to the fuel?

Ok some good news. Overboost cutoff has dissapeared. Im assuming that was because the wgfv had lines reversed. But it pulls good.

I played with the mixture screw a little bit. Im now getting about 12-14" of vacuum. However, idle is pretty high at about 1000. It doesnt misfire as bad as it was and does pull pretty good. However, battery had a mild charge so I need to see how it runs tomorrow with a full battery

MM hose is off and it runs? haha waaat?

Yeah weird right? Now get this. If I unplug the big port on the igloo, it will die

Voltmeter reads about a .75-.8 on the O2 sensor when idling now vs the original .3 so I did richen it up a little.

To check and see if the computer is compensating you can hold the 02 sensor input (harness side) with one hand and with your other hand touch the pos terminal of the battery/ jumper post for full rich, and any ground for full lean. This is to check to see if the computer is compensating and the hardware can.

Also, find somebody with a smoke machine if you still feel there may be vac leak. Its a sure fire way to find any problems right off the bat.

Im gonna buy some cigars tonight and do my own smoke test lol. It just seems weird the engine draws more vacuum without the intake attached

You can laugh if you want but I am wondering if the spinning turbo could be sucking air through the metering plate, keeping it open and metering fuel when the mm hose is disconnected.

Um, where is the BPV discharge going again?

GTJeff wrote:You can laugh if you want but I am wondering if the spinning turbo could be sucking air through the metering plate, keeping it open and metering fuel when the mm hose is disconnected.

Um, where is the BPV discharge going again?

That actually makes perfect sense Jeff. I say that because I do feel air being pushed out of the MM hose when it is disconnected. Could this be a problem? Right now the BPV is hooked up but venting to the atmosphere. It's not drawing in air until light throttle but closes immediately when under heavy throttle. I capped it off to see if idle changes, but it did not

I don't think that is really a problem. What I do see as a problem (even though you said it didn't affect idle) is the bpv venting to atmosphere at idle. I forgot about that when I recommended you try it as a BOV. I think that will make it difficult to adjust the idle properly. Maybe just remove it for now or plumb it in as close as possible to the turbo inlet (as far away as possible from the metering plate). Then I think you should just try and get the idle adjusted properly and see how she is running. Have you verified the ISV temp sensor and the idle switch on the tps are both working? Either will cause a non-functioning ISV and a high idle. Have you checked the injector spray patterns? Crummy spray patterns at low metering plate opening (idle) will cause missfires at idle.

How do I check spray patterns? Pull them out and run the car?

You can't have a bov in a cis system imo. If you vent it to atmosphere the plunger will go too high and richen up the mixture when turbo is spinning and when it isn't create a lean mixture when intake is under vacuum (most noticable when "bleeping" the throttle), if you recirc back to pre turbo, between turbo and igloo pipe with boost your gonna be slamming the plunger down creating lean condition.

There's a place in dalton gardens that can rebuild injectors and check spray patterns. I think it's like 90$ for five iirc. The company is "MR. Injector" phone# 762 3450.
Btw cool to see your project's coming together, are you going to try and make the autox on the 30th?

Carlos wrote:You can't have a bov in a cis system imo. If you vent it to atmosphere the plunger will go too high and richen up the mixture when turbo is spinning and when it isn't create a lean mixture when intake is under vacuum (most noticable when "bleeping" the throttle), if you recirc back to pre turbo, between turbo and igloo pipe with boost your gonna be slamming the plunger down creating lean condition.

Understood. Its just a temporary situation until I weld a 1" port on to the intake elbow so I can plumb the bpv into it

Quatro16 wrote:There's a place in dalton gardens that can rebuild injectors and check spray patterns. I think it's like 90$ for five iirc. The company is "MR. Injector" phone# 762 3450.
Btw cool to see your project's coming together, are you going to try and make the autox on the 30th?

Who knows. At the rate this thing is now coming together, I have no idea what to expect anymore. Where is autox? Is that the one in Deer Park or w/e

Make sure the engine is cold! Check spray patterns by running output checks (see sjm website). The first output turns on the fuel pump. You pull the injectors and put each one in a bottle of some kind, take off the igloo, run the output test, pull up just a little bit on the metering plate or just put a thin peice of wire between it and the cone and the injectors should open and should all spray a nice cone shaped pattern.

I wasnt aware the output checks actually tested the spray pattern.

I always tested them by just removing the injectors, jumping the FP relay, and lifting the plate manually.

Carlos wrote:You can't have a bov in a cis system imo. If you vent it to atmosphere the plunger will go too high and richen up the mixture when turbo is spinning and when it isn't create a lean mixture when intake is under vacuum (most noticable when "bleeping" the throttle), if you recirc back to pre turbo, between turbo and igloo pipe with boost your gonna be slamming the plunger down creating lean condition.

Wait, are you saying you shouldn't discharge a BPV to pre-turbo? Then where would you discharge it?

BTW, I know of a couple people who have a similar engine swap (with CIS) and have run a BOV just fine. I know the theory is that it will mess with the mixture too much, but it does seem to work in practice.

-Rog

Rogviler wrote:

Carlos wrote:You can't have a bov in a cis system imo. If you vent it to atmosphere the plunger will go too high and richen up the mixture when turbo is spinning and when it isn't create a lean mixture when intake is under vacuum (most noticable when "bleeping" the throttle), if you recirc back to pre turbo, between turbo and igloo pipe with boost your gonna be slamming the plunger down creating lean condition.

Wait, are you saying you shouldn't discharge a BPV to pre-turbo? Then where would you discharge it?

BTW, I know of a couple people who have a similar engine swap (with CIS) and have run a BOV just fine. I know the theory is that it will mess with the mixture too much, but it does seem to work in practice.

-Rog

Well it might work in practice to dump to pre turbo-igloo, but imo you will still probs get a boost spike slamming it shut making it way too lean and if the turbo keeps boosting a bit your idle will def suffer. Personally I wouldn't want this to be happening in between hard shifts at high revs on my engine, when downshifting, or when coming up to a stop sign. Changing the co just for your idle is not a good option, co adjustment doesn't just affect idle.

Imo recirc/blowby valves are made for efi engines not cis. It may work, but is it good, i don't think so. I'd just use a electronic decel valve and that's it in a cis setup.

AudiSport4000 wrote:I wasnt aware the output checks actually tested the spray pattern.

I always tested them by just removing the injectors, jumping the FP relay, and lifting the plate manually.

I do it the same way. First I clean the injectors letting them soak in solvent overnight.



The bottle of choice being a diet pepsi with a hole drilled into the cap just big enough to hold the injector nice and tight.



After looking at spray pattern, the injectors can be lined up to see if flow if fairly uniform.

And those things SING! Nice rig ya got there, John.

Can you guess my soda of choice? Thats what makes the pepsi bottle so appealing for the job....I don't have to look far to find five of them. :-)

You know I had a thought. Im going to check the intercooler flow tonight. Im wondering if there isnt any restrictions in it. While I highly doubt it, it never occured that it migh be restricted as it did have small amounts of oil on the end caps from the PO

That might explain why the engine draws more vacuum with the MM hose off

I'd be more concerned as to why it even runs with the MM hose disconnected. If no air is lifting the metering plate, then no fuel ought to be able to get to the injectors. It sounds to me like the fuel distributor has a problem and is letting fuel into the engine even with the plate all the way down. Do you have the plate manually picked up while the engine is running with the MM hose off?