North American Turbocoupe Organization

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Problems at 5 or more psi -- No power, pops and backfires. Struggles to maintain 70mph uphill. Basically anything more than 1/4 throttle and it falls flat on its face.

Most recent codes:

KOEO -- 85,88 (These always show, don't believe they are anything important) I think Jeff mentioned it may have something to do with the fact that one of my cooling fans is no longer run by the computer.

Cont. Mem -- 42, 58, 66

KEOR -- 23, 73, 76 (I have reset the tps, idle is not perfect, but seems ok.

New stuff: Plugs, wires, cap, rotor, O2 sensor, timing belt and timing set at 12 deg. with spout out. Fuel filter is maybe 10K old, and fuel pump (autozone) is 2 years old (strainer was reused). FPR replaced 2 years ago as well.

It is PAINFUL for me to drive my car now. I'm desperate to get this problem solved. Help??!
85 = Electronic Control Assembly status - adaptive "lean" limit reached in fuel control program. This may be related to the 02 code, below, not sure?

88 = Fans
42 EGO - 02 voltage signal alays rich (high value)does not switch. This may relate to 85 above. The ECA is trying to lean the engine out because the 02 is always telling it the mix is rich. This may or may not be an 02 problem.

58 = VAT signal voltage too high (open connection in circuit). Was it 50* air temperature or less when you pulled the codes? If the temp was above 50* see code 66 below

66 = VAF voltage signal too low. This says the VAF is reporting less air than is flowing through the VAF. It could be that the connector to the VAF is bad or the VAF is bad. Check the connector for bent pins of pins pushed back

23 =- TPS sensor voltage out of self test range.

73 you didn't move the throttle far enough during the test.

76 Insufficient VAF sensor change detected during Dynamic Response Portion of Engine Run Self test. Probably relates to 73

I'm going to e-mail you a VAF testing procedure. It's similar to testing a TPS.
I'm also going to e-mail you the fuel systm diagnostics as part of the problem may be fuel related. Try curing the VAF/VAT codes first




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NATO Member. it's not a vice, it's an obsession
"The nice thing about each new day is nobody ever used it before" Barnaby Jones
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Quote:Originally posted by Liquid_force:
Problems at 5 or more psi -- No power, pops and backfires. Struggles to maintain 70mph uphill. Basically anything more than 1/4 throttle and it falls flat on its face.

Codes or not...these sound like classic symptoms of the timing being off. Like the Timing Belt is off the Cam Sprocket a tooth (or more).

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Dan Eaves
88TC 5spd, Crower 5.5" Sportsman Rods, Short Wiseco Pistons bored .030" Over, Ported Head with Polished Combustion Chambers, Gutted & Polished Upper, Ported & Polished Lower, Polished T/B, Ported E6, SVO T3 .63AR Turbo, Bosch Bypass Valve, 3" DP w/No Cat, 2 1/2" DynoMax single cat back w/DynoMax Super Turbo Muffler, RR Cam, K&N in Fenderwell, Gillis Boost Valve, Centerforce I Clutch, Removed A/C, Polished Wheels, Polished Valve Cover, Polished Crank and W/P Pulleys, Walbro 255LPH HP Pump, Kirban Adj FPR, and the DAMN Heater Core is new too !

http://www.geocities.com/wot_turbo/WOT.html

NATO MEMBER (Vice Chairman...if it's a vice...I deal with it)
I tried to e-mail you that stuff and it bounced, no reason given. E-mail me direct if you want it.

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NATO Member. it's not a vice, it's an obsession
"The nice thing about each new day is nobody ever used it before" Barnaby Jones
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
thats the same condition i had when i first got my bird. definatly check the timing AND the SPOUT plug--> for corrosion, pull it out clean it, then recheck the timing. check the fuel pressure too, i had a bad regulator too.
Mine was doing the same thing since I got it, up until last weekend. It turned out that one of the plugs were shot. I mean REALLY BAD!!! I changed it out, and everything was fine. Runs terrific now! [Image: smile.gif]

Rick
Quote:Originally posted by Pete D:
I tried to e-mail you that stuff and it bounced, no reason given. E-mail me direct if you want it.

Sorry Pete, the e-mail I had on my profile isn't active anymore. I've updated it. You shouldn't have a problem now. And thanks for the help.

Quote:Originally posted by Dan E:
Codes or not...these sound like classic symptoms of the timing being off. Like the Timing Belt is off the Cam Sprocket a tooth (or more).

When I did the timing belt I had a guy helping me that was cutting a bunch of corners and I really didn't understand what was going on. Can someone describe what I need to do to make sure timing is correct? BTW, when I adjusted the timing it seemed to idle smoother clear up at 30 deg. and as I backed it back to 12 it started what sounded like a slight miss. But--The problems I'm having were present before I put on the new belt (maybe not as bad).

Quote:Originally posted by PsycopathicBird:
definatly check the timing AND the SPOUT plug--> for corrosion, pull it out clean it, then recheck the timing. check the fuel pressure too, i had a bad regulator too.

The spout is the little connector just down line from the distributor right? Just a little stand alone chip type thing? How should I go about cleaning it?

I'm pretty confident the FPR is ok.

What's an FP guage cost? A couple people have suggested I check that.

Quote:Originally posted by 86tc:
Mine was doing the same thing since I got it, up until last weekend. It turned out that one of the plugs were shot. I mean REALLY BAD!!! I changed it out, and everything was fine. Runs terrific now! [Image: smile.gif]

Rick

It's not a bad plug, that I'm sure of.
Quote:Originally posted by Liquid_force:
When I did the timing belt I had a guy helping me that was cutting a bunch of corners and I really didn't understand what was going on. Can someone describe what I need to do to make sure timing is correct?
This one is simple. Rotate the crank until the timing mark is line up at zero degrees, TDC, and the rotor under the distributor cap is pointing approximately toward the number one plug. The cam timing mark should also be aligned at this point.

You made sure that your ignition timing was 10 degrees or so BTDC with the spout out, right?

Hope this helps.

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Mike Walsted - NATO member
1986 5-speed TurboCoupe and 1985 5-speed XR7
See the article "Cam Timing" in the technical article for a procedure a diagram. It it smoothed out at 30* ingnition advance, then the cam timing is off.

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NATO Member. it's not a vice, it's an obsession
"The nice thing about each new day is nobody ever used it before" Barnaby Jones
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Quote:Originally posted by Pete D:
See the article "Cam Timing" in the technical article for a procedure a diagram. It it smoothed out at 30* ingnition advance, then the cam timing is off.

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