North American Turbocoupe Organization



Check Engine Light
The Shredder Offline
Member
#1
I just fixed the major oil leak that turned out to be the dip stick that wasn't properly seated in the engine block hole. I had torque the bracket that attaches to the intake to make it have downforce to keep the dip stick in the hole.

Anyway, while I was down there working on it, I noticed the ground strap wasn't connected. So I connected it to one of the transmission bolts. Now I get the check engine light after driving for a few minutes. I guess I have to go run the codes...
88TC blue/blue, auto, loaded except leather, bone stock, 127K mi. - back in the TC game!
88TC white, converted 5 spd, K&N filter, Manual Gillis BV, 189K mi. SOLD :-(
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firstsvo Offline
Senior Member
#2
I tried 2 or 3 times to get the dipstick tube to stop leaking. Pushed it down, siliconed it. Still leaked. Take the dipstick tube to the hardware store and get the right size o-ring. No more leak here. Dunno about the check engine light.
White '88 auto mostly stock, Black '88 5 speed nowhere near stock
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Jeff K Offline
Administrator
#3
Crankcase is a sealed system, and a leak at the dipstick can causecthe PCM to compensate for unmetered air. Sealing it up can cause the PCM th relearn LTFT correctio factors, resulting is at CEL for a while. See if the CEL goes out after a while.
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.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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The Shredder Offline
Member
#4
Thanks guys for the input. I put just a little RTV around the end of the dipstick and twisted the dipstick bracket quite a bit to make sure the dipstick stayed seated. That cured the major oil leak.

I ran the codes and was getting a 41. So I replaced the HEGO sensor and things seem to be running better with no CEL!

I also had a coolant leak at the water outlet. So I flushed the cooling system, replaced the oil cooler heater hoses, water neck and thermostat (192-195 deg). It runs much cooler now.

Now I've developed a power steering fluid leak and a noisy PS whine. The PS fluid level is fine, but is really noisy! Man, it's just one fluid leak after another with this car.

To date, I've fixed:
1. Transmission fluid leak - new trans cooler lines
2. Oil leak - oil dipstick
3. Coolant leak - heater hoses and water neck

Now a PS leak! Sad
88TC blue/blue, auto, loaded except leather, bone stock, 127K mi. - back in the TC game!
88TC white, converted 5 spd, K&N filter, Manual Gillis BV, 189K mi. SOLD :-(
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