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94 - G30 not starting now Trouble shooting advice.
#763763 July 20th 2020 3:36 pm
Joined: May 2012
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phils Offline OP
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Hi

Van started fine Friday night, was doing some welding to the body panels Saturday & Sunday with the battery disconnected, now she won't start. she cranks over but does not fire. I've never had any bother with her so not needed to do any mechanical work on her so looking for some troubleshooting steps to diagnose the problem. Will be checking all fuses tonight but where should I start after that?

thansk

Last edited by phils; July 20th 2020 4:31 pm.

1994 5.7l Chevy G30 LWB & 2001 Landrover Defender 90 Truck Cab


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Re: 94 - G30 not starting now Trouble shooting advice.
phils #763767 July 20th 2020 4:46 pm
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New coil under the rotor cap.


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: 94 - G30 not starting now Trouble shooting advice.
phils #763769 July 20th 2020 4:55 pm
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Rust N Dents
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Check the fuses, like you said, then check for spark and check for fuel.

If you're not getting spark at the plugs, check to make sure the coil's getting 12v to it when it's cranking.

If you're not getting fuel pressure, make sure the fuel pump fuse and relay are good before you blame the pump.

One thing to consider... Since you disconnected the battery, go back and make sure you didn't forget to put a wire back on (sometimes there are smaller wires on separate lugs that can get missed when going back together).


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Re: 94 - G30 not starting now Trouble shooting advice.
phils #763773 July 20th 2020 6:28 pm
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one thing i did notice, when i turn the ignition on without cranking the tone your normally hear was somewhat fainter and worbaly!! She down at my GF so will be Friday before it get to look at her again.


1994 5.7l Chevy G30 LWB & 2001 Landrover Defender 90 Truck Cab


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Re: 94 - G30 not starting now Trouble shooting advice.
phils #764180 July 29th 2020 7:43 pm
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OK spent some time last week diagosing the issue, during which i found the problem to be intermittent but mostly failing to start. Here is what Ive found.

Fuses are ok
Fuel pump primes and runs when ignition switched on
No spark at the plugs
No spark at the coil which is getting 12v

inspecting the ignition leads there was some corrosion inside and a split in the boot from the coil
inspecting the distributor cap inside the terminals showed signs of wear as did the rotor
when cranking the distributor is turning and when she starts the distributor is doing its job BUT as a matter of course I'm going to replace with new cap, rotor, ignition leads and sparkplugs

so occasionally I am getting spark at the ignition coil tower to a grounded test light but most often not. Looking at my service books the resistance test on the ignition coil fails as dose the resistance test on the pickup coil (pic 1 & 2) and following the diagnostics charts A3 & 6A I get as far as replace the DI control module. As I have to get everything shipped to UK im prob going to order a Ignition coil, pickup coil and DI control module and as replacing the pickup could involves removing the distributor am I as well to just get a new full distributor as the price is approximately the same?

oops that last picture of the volt meter is the wrong one, I was meant to be the pic of 12v at the coil

Attached Files IMG_20200729_181806.jpgIMG_20200729_181744.jpgIMG_20200729_185813.jpgIMG_20200729_185639.jpgIMG-20200726-WA0043.jpgIMG-20200726-WA0045.jpgIMG-20200726-WA0041.jpg
Last edited by phils; July 29th 2020 7:56 pm.

1994 5.7l Chevy G30 LWB & 2001 Landrover Defender 90 Truck Cab


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Re: 94 - G30 not starting now Trouble shooting advice.
phils #764184 July 29th 2020 8:56 pm
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dont use alum caps ... get a brass top cap ...they last longer and are more reliable. you dont need a new dist just a cap rotor and coil .


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: 94 - G30 not starting now Trouble shooting advice.
phils #764210 July 30th 2020 8:46 am
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do our vans have a crankshaft position sensor? i belive the control module recives a signal from this but I can see mention of this anywhere is it under a different name?


1994 5.7l Chevy G30 LWB & 2001 Landrover Defender 90 Truck Cab


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Re: 94 - G30 not starting now Trouble shooting advice.
phils #764219 July 30th 2020 4:35 pm
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So to add more confusion, it started every time tonight. Really confused now.


1994 5.7l Chevy G30 LWB & 2001 Landrover Defender 90 Truck Cab


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Re: 94 - G30 not starting now Trouble shooting advice.
frscke1 #764880 August 18th 2020 5:32 am
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phils Offline OP
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On the money frscke, I just ordered a coil, module and ignition coil, leads and plugs while I was doing it. She's alive again.

Attached Files IMG_20200818_102657.jpgIMG_20200818_103110.jpgIMG_20200818_103045.jpg

1994 5.7l Chevy G30 LWB & 2001 Landrover Defender 90 Truck Cab


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