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82 928 No Start
- jsettineri
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3 weeks 5 days ago #23140
by jsettineri
82 928 No Start was created by jsettineri
I have an 82 US 928 with the 35 Pin L Jet connector, and have been bringing her back to life over the last 6 months
When purchased, prior owner said there was an issue with the Cold Start valve, where it would take multiple attempts to crank, sit, wait, crank before it fires up.
Following the fun cam tower gasket, water pump and bunch of other front of block repairs, when I put it back together, I have a no start even in 90 degree weather.
I have followed the steps from WSM and what I found at Rennlist/pelican on line with the XVI AFC relay
Pin 30 has power, but the two 87 pins dont get power even with ignition on, unless I jump them with a 3 pin jumper.
Once Jumped i register 12volts from fuel injector female plug to cam tower ground
spark exists w/ a basic illuminated spark tester
fuel pressure flows around 35psi, however the spark plug chamber is bone dry, as i dont think the injectors are firing
(hitting injectors with 9volt batt makes the click click sound)
L Jet 35 pin harness has good grounds- very low ohms at connector 5,16,17 to ground
When I jump L Jet 35 pin harness connectors 10 to ground and 29 to ground I get 12volts
I did a continuity test from L Jet connector 10 and 29 back to the CE wire harness X
continuity exists between AFC wires for pines 87 to the CE wire harness
I have hit a wall with the no start- and looking for any other suggestions as to where to go from here
i just ordered a replacement LJET ECU from 928International to see if that is the issue
any feedback appreciated thanks
When purchased, prior owner said there was an issue with the Cold Start valve, where it would take multiple attempts to crank, sit, wait, crank before it fires up.
Following the fun cam tower gasket, water pump and bunch of other front of block repairs, when I put it back together, I have a no start even in 90 degree weather.
I have followed the steps from WSM and what I found at Rennlist/pelican on line with the XVI AFC relay
Pin 30 has power, but the two 87 pins dont get power even with ignition on, unless I jump them with a 3 pin jumper.
Once Jumped i register 12volts from fuel injector female plug to cam tower ground
spark exists w/ a basic illuminated spark tester
fuel pressure flows around 35psi, however the spark plug chamber is bone dry, as i dont think the injectors are firing
(hitting injectors with 9volt batt makes the click click sound)
L Jet 35 pin harness has good grounds- very low ohms at connector 5,16,17 to ground
When I jump L Jet 35 pin harness connectors 10 to ground and 29 to ground I get 12volts
I did a continuity test from L Jet connector 10 and 29 back to the CE wire harness X
continuity exists between AFC wires for pines 87 to the CE wire harness
I have hit a wall with the no start- and looking for any other suggestions as to where to go from here
i just ordered a replacement LJET ECU from 928International to see if that is the issue
any feedback appreciated thanks
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2 weeks 6 days ago #23141
by jsettineri
Replied by jsettineri on topic 82 928 No Start
update on this:
got proper power to AFC XVI relay and replaced relay
next was purchasing a known working LJET ECU
it now runs for a few minutes at idle speed (with holding the starter for about 5 seconds)
then shuts down
accelleration in neutral is rough, slow and limited
also hearing some misfiring, have not reset timing with light yet
anyone have next place to look for short idling then dead?
ran smoke machine through intake air flow and saw no signs of smoke penetrating
got proper power to AFC XVI relay and replaced relay
next was purchasing a known working LJET ECU
it now runs for a few minutes at idle speed (with holding the starter for about 5 seconds)
then shuts down
accelleration in neutral is rough, slow and limited
also hearing some misfiring, have not reset timing with light yet
anyone have next place to look for short idling then dead?
ran smoke machine through intake air flow and saw no signs of smoke penetrating
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2 weeks 4 days ago #23142
by jsettineri
Replied by jsettineri on topic 82 928 No Start
next update:
distributor cap car was equipped with had incorrect firing order on it...
put wires on fake terminals fires right up
now it's burning oil never has before not even a hint
hopefully not the camshaft tower gaskets already did that
distributor cap car was equipped with had incorrect firing order on it...
put wires on fake terminals fires right up
now it's burning oil never has before not even a hint
hopefully not the camshaft tower gaskets already did that
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