North American Turbocoupe Organization



Idle Speed Problems
anasazi4st Offline
Senior Member
#11
(08-17-2020, 01:25 PM)Jeff K Wrote: Did you replace the PCV valve with the correct Motorcraft EV127A part of some aftermarket junk? The only PCV valve that will perform correctly is the Motorcraft part.

^^^^I can testify to this myself. Do an eBay search for a Motorcraft EV127A as Jeff says, not likely to find it at an auto parts store.

I had a problem with oil leaks from the engine. A bad or inferior PCV valve can cause that by allowing too much air pressure buildup in the crankcase/oil pan. After some testing I gave up on the aftermarket PCV valve I had been using and installed the indicated Motorcraft one. Oil leaks greatly diminished, car runs better.

They both seemed identical, but obviously not.
Another proud dues-paying member.

1987 Turbo Coupe w/T5OD, 8.8 axle, grey smoke; most options. Got it in 1991 with 41K miles: 3 turbos, 2 heater cores, 3 T5OD full rebuilds, 6 clutches, 1 head gasket, 2 Teves II ABS units, etc. later....
Reply

Jeff K Offline
Administrator
#12
I picked up a few EV127A PCV valves on Ebay a year or 2 ago for a decent price just to have them around before they become impossible to find.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
11 Crown Vic Interceptor
14 Toyota Camry (wifes car)
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
Reply

Cullen Offline
Member
#13
Wow!
I finally found the problem.
I have an intercooler on this 85 engine where the 85 never had an intercooler. I have a silicone rubber boot that connects the intercooler outlet to the rubber hose that then connects to the plenum input. The silicone boot and the rubber hose We’re connected by a pvc sleeve with single clamps. I had all of this covered with sticky backed heat reflector. I took that all apart this afternoon and found the plastic sleeve had still been warped by the turbo heat and the boost pressure would leak right out of the connection.
Update more later.
Thanks guys.
Reply

Jeff K Offline
Administrator
#14
Schedule 40 PVC pipe is not rated for high temperatures as you found out. Schedule 80 PVC pipe is rated for higher temps, but I still wouldnt use in under the hood.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
11 Crown Vic Interceptor
14 Toyota Camry (wifes car)
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
Reply

Cullen Offline
Member
#15
This problem was all of my own making.
Putting a 2.3 liter Turbo in a 1929 Ford pickup was a challenge in every way. The 85 Turbocoupe engine I bought had no sensors, or auxiliary systems, no starter, no alternator, no mass air flow, no ECU, etc.
So I had to learn about all those things and figure a way to put them under a tiny Model A hood. I added an intercooler but had to find one small enough and alter it to fit. 
So it turns out that my method of coupling the hoses from the intercooler and intake plenum got too hot and allowed the coupling to come apart just enough to cause my problem.
Reply

anasazi4st Offline
Senior Member
#16
(08-21-2020, 10:19 AM)Cullen Wrote: This problem was all of my own making.
Putting a 2.3 liter Turbo in a 1929 Ford pickup was a challenge in every way. The 85 Turbocoupe engine I bought had no sensors, or auxiliary systems, no starter, no alternator, no mass air flow, no ECU, etc.
So I had to learn about all those things and figure a way to put them under a tiny Model A hood. I added an intercooler but had to find one small enough and alter it to fit. 
So it turns out that my method of coupling the hoses from the intercooler and intake plenum got too hot and allowed the coupling to come apart just enough to cause my problem.

If I can, I’d like to ask a simple question that might seem stupid but obvious...do you really think you need an intercooler?

Certainly it provides more horsepower, but in the end your car runs badly. SOME horsepower is better than NONE.
Another proud dues-paying member.

1987 Turbo Coupe w/T5OD, 8.8 axle, grey smoke; most options. Got it in 1991 with 41K miles: 3 turbos, 2 heater cores, 3 T5OD full rebuilds, 6 clutches, 1 head gasket, 2 Teves II ABS units, etc. later....
Reply

Cullen Offline
Member
#17
The 85 Turbocoupe Mustangs did not have an intercooler but this was my first experience with turbos so it was an opportunity for me to learn.
Frankenstein as I call it, is plenty fast enough and will run over any speed I ever will drive it.

I did not know the engine compartment would get so hot but I put all of these systems under the hood of a 1929 Ford pickup. After a while I wrapped all the intake with heat reflective insulation but the pvc must have already been compromised.

I also added an insulated piece of aluminum that helps direct outside air from a scoop on the side of the hood past the turbo and then directs it under the cab. This has helped my incoming air to be cooler as my air filter is also very near the turbo. Itis all a tight fit under a hood that is about 24 inches wide.
Fun to build, FUN to drive! At 74 it keeps me getting up excited in the morning.
Reply

Cullen Offline
Member
#18
I had a piece of exhaust pipe sized to replace the pvc coupling.
I would posts some photos but have no luck getting them posted on this site.
Reply





Users browsing this thread:
1 Guest(s)



Theme © iAndrew 2018 - Software MyBB