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Discussion Starter · #1 ·
Maybe I can get a little more help over here. I posted this in the 911 section and only got one reply. I have a 98 12 valve, Its hard starting and its sputtering really bad. Before it only did that around 18-1900 rpm. the exhaust fell off a few months ago and I just ordered a new one but it isn't on yet. The truck has a high flow air filter and that is it, so far... I have asked a few people and they seem to think its the turbo, but farmboysdiesel said to have the timing checked. ANY help is greatly appriciated.
 

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Definately NOT the turbo. It has no effect on starting and would only cause it to smoke and run like a bag of chit if it was pootched.

Timing, fuel system leak, plugged fuel filter/heater screen, lift pump, the list goes on!
 

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Fuel system or timing. Definately not a turbo problem.
 

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:agree2: hook a fuel pressure gauge up to it to check the fuel supply system. If the fuel is good its probably slipped timing
 

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Discussion Starter · #6 ·
maybe i should add that it idles fine, but if you hit the throttle is when it cuts out and white smokes. It has also been sitting for two weeks which may be why its hard starting.
 

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I also think its the overflow, but a fuel pressure gauge will tell you. TSB 14-07-96 Rev. A

With the gauge on if you get lower pressure readings, if you pinch off the return line the pressure should shoot up meaning the lift pump is good and the over flow is bad. If it stays the same, then it points at the lift pump or a clogged filter.
 
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