6.5 TD 5spd starts then dies cycle key and repeat. - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Old 10-29-2015, 02:37 PM   #1 (permalink)
duneracerweston
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6.5 TD 5spd starts then dies cycle key and repeat.

Alright I'm at a loss here. I've had this truck since I was a freshmen in highschool 6 years ago. I've already went through the pmd relocation. Now here's what I've ran into, I was working on my girls lancer jumping it off because it had a low battery along with other issues and the truck just died like you turned the key. Then it started only after cycling the key. Well I got it loaded and trailerd back to my shop where I have a 95 6.5 to use to swap parts with. Now I have a known to be good pmd and ops on the truck with a new resistor. Also the lift pump.is good along with the fuel filter that only has 6k on it and it is a wix sang with a new fuel pump relay. Both batteries are hot and we changed one ground cable due to internal corrosion and changed all other ends. The truck will roll over very quickly then fire up run fine then between 15-2 minutes its gonna die if you let the computer let it idle. If you keep constant Pendle tension and hold the motor at rpm it won't die. But if you feather it the moment you let of it will die and not come back even if its moving down the road. I've put my spare fuel shut of on with the same result. I am lost for words with this thing.

96 6.5td 5spd pmd relocated 316kmiles

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96 6.5td 5spd
Relocated pmd
#9 resistor
K&N in box filter
Cat delete
264k miles and still averages 23mpg

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ATA
cold air intake
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Old 10-29-2015, 04:11 PM   #2 (permalink)
57diesel
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If its not giving codes you have to be thinking basics out of the computers control like a fuel issue. Bad fuel? Air in fuel?

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98 Burb K25 4.10's 250K miles, new to me, pretty clean and stock.
95 Burb K25 3.73's CRASHED 250K miles, looks to have been rebuilt at least once, stock, bad rust, DE exhaust w/walker muffler, 8' western plow.
81 Buick Riviera GAVE AWAY with the infamous Olds 5.7 diesel possibly still going strong.
15 VW Golf wagon, TDI. Did the buyback on my 13 Jetta TDI wagon so it was basically a trade up.
96 Burb K25 3.42's SOLD at 340K miles, told it was all original, close race between engine wearing out or body completely rust out.
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Old 10-29-2015, 04:25 PM   #3 (permalink)
duneracerweston
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Its coding but Its always coded. I don't have a code reader for a 96+
The fuel is good. And no air in the fuel. Its like you literally turn the key off and all the power is turned off to the motor and it dies. It doesn't lug pop or chug it just dies. Its exactly like you just turned tg3 key off
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Old 10-29-2015, 05:39 PM   #4 (permalink)
HeavyChevy95
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Undetected air leaks and/or other fuel supply deficiencies will shut it down just as if a ghost had turned the ignition off...
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Old 10-30-2015, 12:25 AM   #5 (permalink)
OkDually
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Auto Parts Stores will Loan out a code reader for a fee. Go find one and get us the exact codes. That will help.
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Old 10-30-2015, 03:38 PM   #6 (permalink)
duneracerweston
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well this presents a problem. we went out to see if the shut off solinoid was loosing fire but it wasnt even when it dies its still at a solid 12.47volts. but thats not the issue, the issue is that the check engine light went off. i no longer have any lights on my dash except for a low water light because the sensor in the tank is dirty..

im at a loss on this one. the lift pump is new the fuel filter is sealing and primed but it just refuses to stay alive without holding throttle to it.

if it was a carb on a atv or bike i would have no problem with this but this has me pulling out my hair.
__________________
96 6.5td 5spd
Relocated pmd
#9 resistor
K&N in box filter
Cat delete
264k miles and still averages 23mpg

**coming soon**
Hx40 turbo
ATA
cold air intake
4" diamond eye straight exhaust
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Old 10-30-2015, 04:49 PM   #7 (permalink)
racer55
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Ignition switches are known problems that are multi contact switches that tend to fail to power the ecm but keep power to other areas.
With there being power at the FSO it might be something else but consider the ignition switch.
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Old 10-30-2015, 08:40 PM   #8 (permalink)
57diesel
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Ignition switch is not too bad to replace but for testing you can just plug the new one in and let it hang below the dash.
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98 Burb K25 4.10's 250K miles, new to me, pretty clean and stock.
95 Burb K25 3.73's CRASHED 250K miles, looks to have been rebuilt at least once, stock, bad rust, DE exhaust w/walker muffler, 8' western plow.
81 Buick Riviera GAVE AWAY with the infamous Olds 5.7 diesel possibly still going strong.
15 VW Golf wagon, TDI. Did the buyback on my 13 Jetta TDI wagon so it was basically a trade up.
96 Burb K25 3.42's SOLD at 340K miles, told it was all original, close race between engine wearing out or body completely rust out.
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Old 11-03-2015, 06:52 PM   #9 (permalink)
duneracerweston
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Well fellas I tried changing the ignition switch but still no dice. Same issues.. I'm at a loss. Im tired of fighting this ds4 pump system. I'm beginning to think swapping to mechanical would just be cheaper in the long run and more reliable.
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Old 11-03-2015, 06:56 PM   #10 (permalink)
JMJNet
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Did you ever changed the batteries?

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