m52 Turbo Build

[chikinhed]

That TPS reading is normal for idle. The fuel pressure is high, it should be 51 psi with vacuum line off FPR and should go down to 43-ish psi with it hooked up. You need to fix this or the tune won't work (unless the tuner has done a bandaid for a bad fuel system but assume that hasn't happened).

Fix the O2 sensor issue. You can't have issues with probes.

[328iFun]

Well this sure as hell isn't helping anything :


Isn't there supposed a crank shaft position sensor there?
Sent from my SAMSUNG-SM-G935A using Tapatalk

[328iFun]

That TPS reading is normal for idle. The fuel pressure is high, it should be 51 psi with vacuum line off FPR and should go down to 43-ish psi with it hooked up. You need to fix this or the tune won't work (unless the tuner has done a bandaid for a bad fuel system but assume that hasn't happened).

Fix the O2 sensor issue. You can't have issues with probes.

O2 fixed. Fuel pressure did drop some with vacuum to fpr

Sent from my SAMSUNG-SM-G935A using Tapatalk

[rajicase]

Well this sure as hell isn't helping anything :

Isn't there supposed a crank shaft position sensor there?
Sent from my SAMSUNG-SM-G935A using Tapatalk

No your crank sensor is at the back of the block , drivers side. That location on the timing cover is for obd1 and should be empty for you.

[pbonsalb]

It looks like your electric fan is covered in oil.

[328iFun]

No your crank sensor is at the back of the block , drivers side. That location on the timing cover is for obd1 and should be empty for you.

I know,

I was so happy when I first saw it thought maybe I figured it out.



Sent from my SAMSUNG-SM-G935A using Tapatalk

[328iFun]

It looks like your electric fan is covered in oil.

It is, trying to figure out where it is coming from as well.

May have been when I removed my previous oil drain setup

Sent from my SAMSUNG-SM-G935A using Tapatalk

[328iFun]

I might have a nice turbo kit for sale here soon.

And I'll take the car in the woods and catch it on fire

Sent from my SAMSUNG-SM-G935A using Tapatalk

[pbonsalb]

It is, trying to figure out where it is coming from as well.

May have been when I removed my previous oil drain setup

Sent from my SAMSUNG-SM-G935A using Tapatalk

Did you have an unbaffled catch can with breather filter in the area or just an open vent hose in that area?

You are probably close. Just need some experienced in-person help to sort the car. Any members here on your area?

[crazyyardie]

Have u checked on your vent valve ? Not sure of the obd2 throttle body carries that hose from the throttle body to the vent valve


Sent from my iPhone using Tapatalk

[exvitermini2]

What part of VA are you in? I'm in central area, could probably help you out.

[328iFun]

Did you have an unbaffled catch can with breather filter in the area or just an open vent hose in that area?

You are probably close. Just need some experienced in-person help to sort the car. Any members here on your area?

Pretty much open vent hose.

Manifold to catch inlet, hose from catch can outlet to vent.

I thought I was close 5 months ago. Doesn't feel like it. Not sure if anyone is around my area

- - - Updated - - -

The only ports on the throttle body for OBDII are coolant ports for 'cooling it' or heating it up in other words. TB shouldn't effect vacuum unless its not securely connected to plenum, boot, or has cracks.

- - - Updated - - -

What part of VA are you in? I'm in central area, could probably help you out.

I'm right in between Charlottesville and Frederickburg, about 30 minutes from both.

I'll PM you

If all else fails you could come over to the watch the fireworks because I will light the car on fire

- - - Updated - - -

I guess the next thing ill try today is Crankshaft Position Sensor. It took about 6-7 revolutions for the car to start yesterday but I haven't read or found any threads where the CPS would effect idle just starting.

I can't believe this thing isn't throwing codes that would indicative of its symptoms

But what has me wondering is when I first started the car when I didn't have the directions on how to wire the blow through MAF I let the car idle without it plugged it and started up and idled decently. Now the car wont idle at all with the MAF unplugged?

[328iFun]

Tried searching:

But the pulse generator or crankshaft position sensor's job is to record crank revolutions and then relay those numbers to the DME. Spark timing is then adjusted based on those numbers. If the numbers are off or incorrect couldn't overall timing be affected and a misfire result?

Similar to a distributor

^ I think this is what's happening

All the symptoms are there:

1. Intermittently long cranking times.
2. Stalling when coming to a stop
3. Misfire
4. Erratic idle

The only thing I don't have is a code, go figure.

http://www.doityourself.com/stry/war...osition-sensor

[328iFun]

Would love to get this resolved so we can start talking about bore, pistons, rods, and a engine rebuild for the spare motor I have sitting on a crate

[Butters Stoch]

Fuel system needs pressure and volume.

[328iFun]

Fuel system needs pressure and volume.

This is true. And with my Fuel Pressure at 55psi, that's means there is less volume and more pressure than needed

Maybe that's the problem, so many maybes.

[328iFun]

Maybe the FPR needs swapped out

[328iFun]

Damn, don't have one to swap out,

parts store doesn't have them either

[chikinhed]

What fuel pump, FPR and other fuel system components are you using?

[328iFun]

What fuel pump, FPR and other fuel system components are you using?

The only thing I upgraded for fuel was the pump. Still on stock rail, lines, and FPR

Fuel pump is walboro 255

[chikinhed]

The 255 should be ok with the stock lines and FPR. Replace the FPR, it should be at 51 psi.

[pbonsalb]

I think at idle, a 255LPH will overrun the stock FPR by a few psi, so I am not sure replacing it will help. Some tuners compensate for this in the tune, but then if you want a 320LPH or 450LPH later, you might need to retune. Or you can use an aftermarket FPR and it takes a little plumbing work, but can handle all the flow you need. I have aftermarket FPR on stock lines and think the stock lines are probably good to about 700 rwhp worth of 91/93 fuel.

[328iFun]

The 255 should be ok with the stock lines and FPR. Replace the FPR, it should be at 51 psi.

I Like the aftermarket units anyway

Sent from my SAMSUNG-SM-G935A using Tapatalk

[328iFun]

I think at idle, a 255LPH will overrun the stock FPR by a few psi, so I am not sure replacing it will help. Some tuners compensate for this in the tune, but then if you want a 320LPH or 450LPH later, you might need to retune. Or you can use an aftermarket FPR and it takes a little plumbing work, but can handle all the flow you need. I have aftermarket FPR on stock lines and think the stock lines are probably good to about 700 rwhp worth of 91/93 fuel.

Thats what I read. I wont be making 700hp anytime soon not until I get my motor built.

If it ain't broke don't fix it

[328iFun]

I replaced the Crank Position Sensor, still the same (What a joy that was)

No codes, except o2 heater circuit.

Fuel pressure is a bit high but it is getting to where it needs to be

Swapped every coil and every plug, there no vacuum leaks.

I did get the car to idle smoothly by messing with MAF wiring. It runs a bit rich but it does idle smoothly and doesn't miss. So maybe ill just leave it that way?

or stuff a rag in the gas tank. Right now taking a break and researching whether or not it illegal to burn a car in Virginia. I would assume it would be okay as long as it were on your property away from other homes, people, etc...