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Need help with 2003 996tt engine start but dies


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Hello All,

I just bought a 2003 996 TT two months a go, the car was driving beautiful, but few days back air bag warning lights came on and stays that way, I ordered the durametric diagnostic software,but yesterday afternoon engine suddenly stop, all the warning lights on dash stays on,engine cranks and start but idling is rough and when I try to rev engine dies. I will appreciate any advice. Thanks.

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May be you got a fuel pump failure. On the fuel pump inside the tank there is a hose in a loop that rupture in many cases.... Look at those four links and especially the one made by Pumalex. Very good info there....

Fuel pump. Fuel pump 2, Fuel pump 3, fuel pump 4

If you got access to a fuel pressure gauge you can do the pressure test at the port besides the fuel filter in the engine compartment. Target 3.3 bar +- .2 ( 43.5 +- 3 psi)

Edited by jpflip
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May be you got a fuel pump failure. On the fuel pump inside the tank there is a hose in a loop that rupture in many cases.... Look at those four links and especially the one made by Pumalex. Very good info there....

Fuel pump. Fuel pump 2, Fuel pump 3, fuel pump 4

If you got access to a fuel pressure gauge you can do the pressure test at the port besides the fuel filter in the engine compartment. Target 3.3 bar +- .2 ( 43.5 +- 3 psi)

I agree with JP possible fuel pump internal pipe failure.

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Hello All and Thanks for the responses and advices,

this is what I did so far:

-I have an old a/c R-12 gauges that fit the fuel pressure port in the fuel filter,and installed it there for reading,when I turn the ignition switch on, the fuel pressure reach only 10 psi, them I press the clutch pedal for cranking, the engine start for one or two second and dies, but during this cycle the fuel pressure never raise above 10 psi.

All this behavior indicates a fuel pump failure, but my question is: If before for several days the air bag warning light stays on unattended, will this condition trigger any engine protection mode that may force this low fuel pressure reading.

Thanks for your help gentleman.

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Hello All and Thanks for the responses and advices,

this is what I did so far:

-I have an old a/c R-12 gauges that fit the fuel pressure port in the fuel filter,and installed it there for reading,when I turn the ignition switch on, the fuel pressure reach only 10 psi, them I press the clutch pedal for cranking, the engine start for one or two second and dies, but during this cycle the fuel pressure never raise above 10 psi.

All this behavior indicates a fuel pump failure, but my question is: If before for several days the air bag warning light stays on unattended, will this condition trigger any engine protection mode that may force this low fuel pressure reading.

Thanks for your help gentleman.

will this condition trigger any engine protection mode that may force this low fuel pressure reading.

No, try and get a Durametric code for the air bag fault.

AS to your low fuel pressure JP will have nailed it on the head,ie split fuel line.

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Good job pala996tt. 10 psi is way too low. Like Frank (Sunnyside) mention I've never heard of a reduce fuel pressure trigger by some kind of protection.... I think you really got a fuel pump hose rupture. Remember to read the post I've provided you because there is a way to replace the hose only without going to a complete pump assembly replacement which is over $500.00. (updated part# 99662010802 and it is $617.25)

Edited by jpflip
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Hello,

I just finish road testing the car after the fuel pump hose fix, I took the pump out and effectively how jpflip and all other advice me was the small black hose loop, I cut the metal clamps, found a similar 5/16 fuel hose u-shape almost similar to the defective one,( I have this hose from a 1998 Yamaha Road Start when I made some fuel system modifications and was in my tool box for years, with the clamps), well I put back this yamaha u-shape fuel hose which fit very tight, put the rest back, start the car and bingo, engine working better than before. i just hope that the made in japan hose hold at least for a while until I find right one. Thank you very much to All for the fast and effective advise provide here.

Now the radio (original Becker) do not work. Should be because I disconnect the battery ground cable for doing the fuel pump job. Well I can live with that, after all I was planing to replace for a better ipod friendly unit, do you have any preference regarding this topic. Thanks.

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Hello,

I just finish road testing the car after the fuel pump hose fix, I took the pump out and effectively how jpflip and all other advice me was the small black hose loop, I cut the metal clamps, found a similar 5/16 fuel hose u-shape almost similar to the defective one,( I have this hose from a 1998 Yamaha Road Start when I made some fuel system modifications and was in my tool box for years, with the clamps), well I put back this yamaha u-shape fuel hose which fit very tight, put the rest back, start the car and bingo, engine working better than before. i just hope that the made in japan hose hold at least for a while until I find right one. Thank you very much to All for the fast and effective advise provide here.

Now the radio (original Becker) do not work. Should be because I disconnect the battery ground cable for doing the fuel pump job. Well I can live with that, after all I was planing to replace for a better ipod friendly unit, do you have any preference regarding this topic. Thanks.

Very good job pala996tt ! For your radio you probably need your radio code to get it back to life. You can get help from the amazing Loren : Lost radio code....

Edited by jpflip
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Hello,

I just finish road testing the car after the fuel pump hose fix, I took the pump out and effectively how jpflip and all other advice me was the small black hose loop, I cut the metal clamps, found a similar 5/16 fuel hose u-shape almost similar to the defective one,( I have this hose from a 1998 Yamaha Road Start when I made some fuel system modifications and was in my tool box for years, with the clamps), well I put back this yamaha u-shape fuel hose which fit very tight, put the rest back, start the car and bingo, engine working better than before. i just hope that the made in japan hose hold at least for a while until I find right one. Thank you very much to All for the fast and effective advise provide here.

Now the radio (original Becker) do not work. Should be because I disconnect the battery ground cable for doing the fuel pump job. Well I can live with that, after all I was planing to replace for a better ipod friendly unit, do you have any preference regarding this topic. Thanks.

Very good job pala996tt ! For your radio you probably need your radio code to get it back to life. You can get help from the amazing Loren : Lost radio code....

:thumbup:

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