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Wedge List / Re: 1980 FI TR8 will not run
« Last post by "Jim Altman" on October 21, 2017, 07:34:11 PM »
36 psi is normal fuel pressure.  If the pressure drop is quick when the key is

turned off itbs the check valve, if it more slowly drifts down then an

injector might be leaking or it could still be the check valve.





Jim Altman

jaltman636@gmail.com
2
Wedge List / RE: TR7/8 Digest V1 #8740
« Last post by "David Huddleson" on October 21, 2017, 07:09:59 PM »
The Lucas DLB110 is NOT a so-called "Sport" coil. It is a coil for
ballasted systems, so therefore a 6v coil. It is however a higher
output coil, and same spec as that originally fitted to EFI TR8 models
("pink" body). Do a Google search and you can read some specs.
3
Wedge List / Re: 1980 FI TR8 will not run
« Last post by Jack Brooks on October 21, 2017, 03:57:48 PM »
Randy,







I believe the pressure should be 30 psi and it should hold pressure for hours.







MY OPINION: The pressure drop could be a failed injector and could be the issue.  The higher pressure could make it run poorly (rich) bit likely not the big issue.  







Experts?







Jack
4
Wedge List / Re: 1980 FI TR8 will not run
« Last post by "Jim Altman" on October 21, 2017, 03:52:29 PM »
Close enough.  I think 34 is spec.  Don't have a book in front of me.

Dropping right off means the check valve in the pump leaks, but no big deal.

May make it take a moment longer cranking to start.





Jim Altman

jaltman636@gmail.com
5
Wedge List / Re: 1980 FI TR8 will not run
« Last post by Randy Tess on October 21, 2017, 03:30:31 PM »
38 PSI when the fuel pump is running



Pressure drops as soon as I pull they key.



I think that is normalb&correct?



Randy
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Wedge List / Re: 1980 FI TR8 will not run
« Last post by W Parris on October 21, 2017, 01:06:49 PM »
Pop the top. Loosen the screws that hold on the carbon track and shift it one way. Sometimes the track is worn and really skews the reading.  







Will







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Wedge List / Re: 1980 FI TR8 will not run
« Last post by Randy Tess on October 21, 2017, 01:04:51 PM »
Thanks!



I have checked the AFM.  I even popped the top to see what it looks like in

there.  It LOOKS free and clean and moves as expected, I guess.



I have not checked the fuel pressure yet.  I need to find a gauge to

accomplish that.  I just have vacuum gauges.



Randy
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Wedge List / Re: 1980 FI TR8 will not run
« Last post by Darrell Walker on October 21, 2017, 01:00:27 PM »
Hi Randy,



Have you checked that the flap in the AFM isnbt stuck open?  Have you

checked fuel pressure yet?  If your fuel return was blocked for some reason,

or if the regulator wasnbt working, the pressure could get really high, and

inject more fuel than the ECU expects.



I think there are some electrical tests you can make on the AFM with an ohm

meter, to make sure it isnbt too out of whack.



-Darrell



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Wedge List / Re: 1980 FI TR8 will not run
« Last post by Randy Tess on October 21, 2017, 12:31:24 PM »
Well, as an update.  



I switched the Coolant Temp Sensor and no change.



I pulled the cold start injector and it is not stuck open BUT



With the injector still out, I started the car.  It fired up and ran at a VERY high idle.



If I partially blocked the cold start injector hole I could modulate the idle speed.  Left open the idle would run away running near redline.



It almost seems as if there is an air intake issue.  Or lots of fuel being dumped into the engine.



I would like to switch out the AFM just to be sure.



Where can I get one?



Randy















With the hole in theplenum where the cold start injector sits, the
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Wedge List / Re: 1980 FI TR8 will not run
« Last post by FOSmith on October 21, 2017, 10:08:34 AM »
The sport coil is not correct I believe it is for a non ballasted ignition .

However I still suspect your problem is high resistance in the cts circuit

making the ecu think the engine is really cold and needs extra fuel. A faulty

sensor or a bad connection will do this .

Fred



Sent from my iPhone



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