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  #1  
Old 01-05-2005, 08:51 AM
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mohrds mohrds is offline
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Angry Bad Gas??

On Friday, I filled up the SVX at a Super America station. It ran fine until Sunday. Sunday morning (30 miles after the fillup) I drove to the store and as I pulled into the space, the car sputtered and died. It wouldn't restart. I went into the store to let it sit and when I came out it fired up for about a half a second then died. It wouldn't fire after that. Naim and I towed the car to the garage. Hours later, it still wouldn't fire. The computer is giving the "All OK" flash when I pull the codes.

Here is what I have tried so far to diagnose the problem:
1. Change Fuel filter
2. Check for fuel flow during startup.
3. Checked for ECU codes
4. Swapped in a spare ECU

Last night I went to work on it and it fired up for a half second again, then no fire.

I would think if it was electrical, it would throw a code. The fuel pump is working, but I haven't measured output flow.

I'm tempted to throw a few cans of isopropyl in the tank and let it sit for 24 hours.

Any thoughts?

Doug
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  #2  
Old 01-05-2005, 09:07 AM
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Re: Bad Gas??

Quote:
Originally posted by mohrds
On Friday, I filled up the SVX at a Super America station. It ran fine until Sunday. Sunday morning (30 miles after the fillup) I drove to the store and as I pulled into the space, the car sputtered and died. It wouldn't restart. I went into the store to let it sit and when I came out it fired up for about a half a second then died. It wouldn't fire after that. Naim and I towed the car to the garage. Hours later, it still wouldn't fire. The computer is giving the "All OK" flash when I pull the codes.

Here is what I have tried so far to diagnose the problem:
1. Change Fuel filter
2. Check for fuel flow during startup.
3. Checked for ECU codes
4. Swapped in a spare ECU

Last night I went to work on it and it fired up for a half second again, then no fire.

I would think if it was electrical, it would throw a code. The fuel pump is working, but I haven't measured output flow.

I'm tempted to throw a few cans of isopropyl in the tank and let it sit for 24 hours.

Any thoughts?

Doug
it is either output Flow of the pump or injectors sensors
the timing belt can also have this impact (if it is somehow uncalibrated). can also be spark plugs....
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  #3  
Old 01-05-2005, 09:17 AM
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Re: Re: Bad Gas??

Quote:
Originally posted by SilverSpear


it is either output Flow of the pump or injectors sensors
the timing belt can also have this impact (if it is somehow uncalibrated). can also be spark plugs....
I find it improbable that all six spark plugs could fail within a few seconds of each other. The timing belt may have slipped, but why would it fire after sitting two days?

I need to look through the service books to see what the fuel pump should be outputting.
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  #4  
Old 01-05-2005, 09:26 AM
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Re: Re: Re: Bad Gas??

Quote:
Originally posted by mohrds


I find it improbable that all six spark plugs could fail within a few seconds of each other. The timing belt may have slipped, but why would it fire after sitting two days?

I need to look through the service books to see what the fuel pump should be outputting.
It couldn't be all sparks, 2 or 3 is more than enough.
what about injector sensors or a weak gas pump
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  #5  
Old 01-05-2005, 10:08 AM
SVXer95 SVXer95 is offline
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Fuel Pump? Would a bad pump throw a code?
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  #6  
Old 01-05-2005, 10:18 AM
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Doug,
So, the engine turns over fine, just doesn't "catch"?
Could the exciter be bad, thus no signal for the coils to fire?
Line dry probably isn't a bad idea, I'm just not sure that water in the gas would totally keep the engine from running (that would take a lot of water!)
-Bill
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  #7  
Old 01-05-2005, 10:31 AM
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Quote:
Originally posted by SVXRide
Doug,
So, the engine turns over fine, just doesn't "catch"?
Exactly. It "seems" like there is no spark, however in SE Wisconsin, we have had a rash of bad gas at various stations during the EPA's mandatory "Winter blend" switchover. Too bad the EPA won't cover the repair costs...

It could be an igniter, where is it on the SVX? I have a spare engine and a 5 speed project I can borrow parts from.

Doug
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  #8  
Old 01-05-2005, 10:43 AM
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Quote:
Originally posted by mohrds


Exactly. It "seems" like there is no spark, however in SE Wisconsin, we have had a rash of bad gas at various stations during the EPA's mandatory "Winter blend" switchover. Too bad the EPA won't cover the repair costs...

It could be an igniter, where is it on the SVX? I have a spare engine and a 5 speed project I can borrow parts from.

Doug
On the firewall, in the center of the car, at the top of the firewall, just behind the airbox. In this picture, you can see where the green wires go into it from the pass side.
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  #9  
Old 01-05-2005, 11:13 AM
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Thanks! I'll keep that in mind.

I'll try a little of the isopropyl, try and measure the fuel pump's volume and pressure, then check the igniter.

Doug
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Black over Claret with spoiler; 235,000 miles; Mods: 2002 Legacy 5 speed, ACT Pressure Plate, Excedy Clutch, Short Throw Shifter, Aussie Powerchip
1992 LS Touring (6/91)
Black over Claret with 2.5" setback spoiler; 202,000 miles; Mods: B&M Cooler
1994 LSi (4/93)
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  #10  
Old 01-27-2005, 01:35 PM
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Found the problem. There was no compression on the driver's side cylinder bank because...













The timing belt slipped. The timing belt shield broke and a chunk fell into the pulley and allowed the belt to slip.



I can't figure out why it didn't throw a code. Shouldn't it if the cam angle sensors don't match readings??

Doug
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1992 LS Touring (6/91) - Currently undergoing a five speed swap
Black over Claret with spoiler; 235,000 miles; Mods: 2002 Legacy 5 speed, ACT Pressure Plate, Excedy Clutch, Short Throw Shifter, Aussie Powerchip
1992 LS Touring (6/91)
Black over Claret with 2.5" setback spoiler; 202,000 miles; Mods: B&M Cooler
1994 LSi (4/93)
Bordeaux Pearl; 198,000 miles; Mods: Weight reduction.

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  #11  
Old 01-27-2005, 04:37 PM
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Quote:
Originally posted by mohrds
Found the problem. There was no compression on the driver's side cylinder bank because...













The timing belt slipped. The timing belt shield broke and a chunk fell into the pulley and allowed the belt to slip.



I can't figure out why it didn't throw a code. Shouldn't it if the cam angle sensors don't match readings??

Doug
Well thats weird Doug, What broke the cover?
The cam position sensor was working ok, it was just telling the ECU that the wrong set of three cylinders were ready to fire.









you know who told you so.

Harvey.
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  #12  
Old 01-27-2005, 04:38 PM
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There is only 1 cam sensor (that I'm aware of)on each side is it the other cam?
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  #13  
Old 01-27-2005, 09:01 PM
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Quote:
Originally posted by oab_au
you know who told you so.

Harvey.
Actually I don't know. Did you? Honestly I don't remember the conversation. I guess old age is setting in quicker than I expected...

Doug
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1992 LS Touring (6/91) - Currently undergoing a five speed swap
Black over Claret with spoiler; 235,000 miles; Mods: 2002 Legacy 5 speed, ACT Pressure Plate, Excedy Clutch, Short Throw Shifter, Aussie Powerchip
1992 LS Touring (6/91)
Black over Claret with 2.5" setback spoiler; 202,000 miles; Mods: B&M Cooler
1994 LSi (4/93)
Bordeaux Pearl; 198,000 miles; Mods: Weight reduction.

1969 Mustang GT Convertible
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Sola lingua bona est lingua mortua.

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