14B gone crazy?!

[gstspoolin]

Okay now after the longest turbo swap in history (6days) I've finally managed to swap the T-25 out and the 14b in. Now I re-used the exhaust mani---->head gasket. The only thing is that the 02 housing only had 1 stud to connect to the downpipe. So I know I have a leak there.

When taking the car for a test drive the car would "cut off" and it would studder real bad and the check engine light would flicker on/off; this would happen once I get to around 2700rpm. I was not punching it, just accelerating normal. It keeps doing this a lot.

Should I recirculate my BOV?
Is it the downpipe not completley connected?

My a/f fuel gauge (autometer) still reads the same as when I had my t25 in. When I do punch it, my boost guage only reads about 4psi.


Any advice??

 

[larsrya8]

Boost leak?

 

[mirkoelek]

Okay now after the longest turbo swap in history (6days) I've finally managed to swap the T-25 out and the 14b in. Now I re-used the exhaust mani---->head gasket. The only thing is that the 02 housing only had 1 stud to connect to the downpipe. So I know I have a leak there.

When taking the car for a test drive the car would "cut off" and it would studder real bad and the check engine light would flicker on/off; this would happen once I get to around 2700rpm. I was not punching it, just accelerating normal. It keeps doing this a lot.

Should I recirculate my BOV?
Is it the downpipe not completley connected?

My a/f fuel gauge (autometer) still reads the same as when I had my t25 in. When I do punch it, my boost guage only reads about 4psi.


Any advice??

Did you hook back you MAS? Do you have any boost leaks, sounds like a boost leak...

 

[gstspoolin]

yea i hooked my MAS back up....one more thing I forgot to tell you guys....since I also installed the 1g o2 housing I also used the 1g o2 sensor, but I had to cut the clip and splice a 2g clip on to it. I'm just gonna pick up a whole new 2g o2 sensor tomorrow and see if that helps.

 

[larsrya8]

yea i hooked my MAS back up....one more thing I forgot to tell you guys....since I also installed the 1g o2 housing I also used the 1g o2 sensor, but I had to cut the clip and splice a 2g clip on to it. I'm just gonna pick up a whole new 2g o2 sensor tomorrow and see if that helps.

The DSM ECU doesn't use the O2 sensor at WOT, so a new oxygen sensor shouldn't make a difference. Check for boost leaks first. It's a lot cheaper, and you should do it after a turbo install anyway.

 

[EclipseTrbo420A]

All the of sensors are different. I would get tht 2G Housing with sensor. The 2G flows better and you know about the sensor.

Also your problem sounds like a boost leak to me. Goodluck.

 

[mirkoelek]

yea i hooked my MAS back up....one more thing I forgot to tell you guys....since I also installed the 1g o2 housing I also used the 1g o2 sensor, but I had to cut the clip and splice a 2g clip on to it. I'm just gonna pick up a whole new 2g o2 sensor tomorrow and see if that helps.

If is the O2 sensor your car should work fine at WOT and lets somewhere over 3000 rpms

 

[MrBoxx]

Should I recirculate my BOV?

You should already know the answer to that one, given the site you're on.

My a/f fuel gauge (autometer) still reads the same as when I had my t25 in. When I do punch it, my boost guage only reads about 4psi.

The boost will be limited by the stock BCS, if you're still using it. When I did my 14b swap, boost went from 12psi on the T25 to 7psi on the 14b, having changed nothing else. The car was still faster anyway. The A/F gauge... well, we all know how useful they are.

Now I re-used the exhaust mani---->head gasket. The only thing is that the 02 housing only had 1 stud to connect to the downpipe. So I know I have a leak there.

Did you take the mani off the head when you did your swap? If you did, it should be fine to re-use. Try to get the other O2 stud as soon as you can.

Hopefully the O2 sensor is partly your culprit. I agree with the others that you should do a boost leak test. Just to be sure though, check the conditions of your spark plugs. I'm thinking it's mostly a boost leak, though. Did you use a gasket or any gasket-maker between the compressor outlet and J-pipe?

Okay now after the longest turbo swap in history (6days) I've finally managed to swap the T-25 out and the 14b in.

Mine took about 8 days, start to finish, and eventually required my mechanic uncle to help me and after which, the car wouldn't start, so you're doing better than I did.

 

[gstspoolin]

Here's the update guys...

Mrboxx - I got the gasket for the j-pipe/compressor from Satan. When I had my T-25 I never recirculated my BOV, it ran perfect. Never stalled when I let go of the gas or anything.

Okay, I went back to Satan and got new gaskets for the ex.manifold ---->head and ex.manifold --->turbo. I also got the bolt for the O2 housing so I can correctly connect the downpipe. So I installed everything and did a boost leak test....everything was great.

I go to start the car...it starts all my gauges are reading correctly. I back it out the driveway and (remember everytime I've tested it i've never gone more than 15mph!!!)go to test it, the same thing happens. The engine light comes on...the car hesitates real bad. In other words undrivable.

My gut feeling tells me its something "electrical' or something in the car is not "reading" right.
The only thing I f*cked with electrical was the o2 sensor. I'm getting a 2g one fr. a member here. So any other suggestions as to what I should check???

 

[siceclipse]

what happened to your 2g o2 housing and sensor?

 

[staticbrainwash]

This may sound crazy. . . But just for shits, try a couple things.

#1, Try unplugging and re-plugging in your MAS a couple times and make sure it's on all the way.

#2, Alright, don't get out the looney bin vests or anything because this one is out in left field. But hey, How about you try recirculating. Don't ask questions, no "but blah blah", just try it.

Also, i agree with the above. Why did you go to a smaller O2 housing? The 2g o2 is usually an UPGRADE for the 1g guys. I mean hell, i've got one sitting right next to me along with a 2g ex. manny.

Is this happening while lightly accelerating? Or is the stuttering and hesitation at WOT?

 

[gstspoolin]

the reason I went with the 1g o2 housing was because it was already connected to the turbo. I didn't know at the time that the 1g o2 sensor had a different clip at the end, so I spliced a 2g clip on it.

I just wanted to slap on this turbo to replace my T-25 so I didn't care if the 1g o2 housing is smaller or not better. (I'm building a 6 bolt to swap) so I just need this 7 bolt to last me another year or so. I'm not gonna build this 7 bolt up.


My 2g o2 housing I took it out while still connected to my T-25....i'm not even gonna attempt to disconnected from that turbo now since it out of the car.


I'll try dis-connecting and the MAS a couple of times, I'll let you guys know.

 

[siceclipse]

that 1g o2 housing is gonna promote creep.

 

[staticbrainwash]

Yeah, but creep isn't the issue here. It's hesitation and stalling.

Please try recirculating though. If it doesn't help fine, but just try. I would just be one more thing to rule out.

Also, Have you checked plugs and wires recently, as well as timing?

 

[MrBoxx]

If the CEL is coming on, you should be able to read a code with any OBDII reader. See if you can borrow one from Autozone or a similar auto parts store and see what it comes up with.

 

[staticbrainwash]

Or a logger if you have one or can borrow one.

 

[BISHILVR]

Yeah, but creep isn't the issue here. It's hesitation and stalling.

Please try recirculating though. If it doesn't help fine, but just try. I would just be one more thing to rule out.

Also, Have you checked plugs and wires recently, as well as timing?

The timing on a 95 cant be changed.

 

[staticbrainwash]

How can timing not be changed?

 

[BISHILVR]

How can timing not be changed?

The cam position sensor is locked in place behind the intake cam and is not adjustable, same for the crank sensor, it is locked in place and cannot be changed. The valve timing can still be changed, but it sounds like you were talking about the ignition timing when you were saying "check plug wires and timing".

 

[GVR4592]

Maybe I missed it, but did you do a boost leak test?

 

[90blacktsiawd]

Now i've had somewhat of the same problem before and it turned out i was running pig rich. Your not going to be able to tell this without a logger though. Basically when i would hit a certian ammount of boost (can't remember what) the car would just stutter and stumble. See if it happens in more gears than just first or second. Maybe messing with the o2 sensor is affecting you in a wierd way. But a logger would definately be a help in this situation.

 

[RipperXX]

...........*walks away*

 

[snox135]

People have been tuning cars with out loggers for a very long time.

Pull your plugs are read them

 

[staticbrainwash]

Checking plugs is great, but to know for sure. . . a logger is the safest way to go.

That was real helpful BTW, Can't even tell the guy what to look for on plugs. WAY TO GO!

 

[snox135]

If you don't know th basics of reading plugs maybe you shouldn't be tuning anything including your lawnmower. I'm sure he already knows basic plug reading.