In need of help with my 944 porsche
Discussion
i cant get it to start this is what happened..... driving it one day i feel something happen but wasnt sure what it was but right after when i gave it gas it did nothing then on its way to dying it started to sound like it was missing then it shut off, i then tow it home and find out its the fuel pump ok so i replace that, and now it still will not start and its getting gas up to the rail the plugs are new and i have spark and they are covered in gas, oh i also changed the fuel filter and fuel rail(because i broke the old one) the battery is good everything seems to be good it just keeps turning over and over and over but i have got it to start for a very brief second then it shut off oh and the tach does bounce when i try to start it and i think thats about all the info i have off the top of my head so ask all the ?s you want and any suggestion on what could be wrong would be nice thanks
I tryed taking the plugs out to make sure all have spark and I tryed gas went everywhere as well so I'm assuming it has compression judging from the shower it gave me....I'm currently leaving the plugs out and letting them sit hopefully the gas will evaporate its been 8hrs now since I've done that and I've yet to check to see if there's a change but if I'm getting fuel spark and air....whts left? I don't see how the timing would magically becomes off I don't I'm just running out of ideas of what could be wrong
9za4ck4 said:
I tryed taking the plugs out to make sure all have spark and I tryed gas went everywhere as well so I'm assuming it has compression judging from the shower it gave me....I'm currently leaving the plugs out and letting them sit hopefully the gas will evaporate its been 8hrs now since I've done that and I've yet to check to see if there's a change but if I'm getting fuel spark and air....whts left? I don't see how the timing would magically becomes off I don't I'm just running out of ideas of what could be wrong
You've put the leads back on the plugs in the correct order?You know, re-reading this I would give a slightly different diagnosis.
The pump may have been on its way out, but not compleately dead. I would take a closer look at the ignition.
Start with the infamous DME relay. As a 944 driver, you carry a spare in the glovebox, right? Well, swap it over with the one in the fusebox and try that.
Also, look at the rotor arm. Check this is OK, and the rotor cap is fine, too. As above, check the leads are OK and in the right order.
Check the gap for the plugs, and they are dry. They might need a quick clean with a wire brush. Put this all back as before, then try again.
The pump may have been on its way out, but not compleately dead. I would take a closer look at the ignition.
Start with the infamous DME relay. As a 944 driver, you carry a spare in the glovebox, right? Well, swap it over with the one in the fusebox and try that.
Also, look at the rotor arm. Check this is OK, and the rotor cap is fine, too. As above, check the leads are OK and in the right order.
Check the gap for the plugs, and they are dry. They might need a quick clean with a wire brush. Put this all back as before, then try again.
Sometimes if an older engine has been flooded and stalled the unburnt fuel in the cylinders washes the oil film off the cylinder walls, spoils the seal of the piston rings and result in a reduction of compression sufficient to interfere with cold starting. I don't know if this is a particular problem with the 944 engine.
williamp said:
You know, re-reading this I would give a slightly different diagnosis.
The pump may have been on its way out, but not compleately dead. I would take a closer look at the ignition.
Start with the infamous DME relay. As a 944 driver, you carry a spare in the glovebox, right? Well, swap it over with the one in the fusebox and try that.
Also, look at the rotor arm. Check this is OK, and the rotor cap is fine, too. As above, check the leads are OK and in the right order.
Check the gap for the plugs, and they are dry. They might need a quick clean with a wire brush. Put this all back as before, then try again.
I have checked the rotor and all of that and yeah the leads are right and I thought if fuel was getting to the rail then that would cancel out the possibility of the dme relay would it not? Bc I've kinda been thinking it was the relay but after I saw pressure getting up to the rail then I scratched that idea The pump may have been on its way out, but not compleately dead. I would take a closer look at the ignition.
Start with the infamous DME relay. As a 944 driver, you carry a spare in the glovebox, right? Well, swap it over with the one in the fusebox and try that.
Also, look at the rotor arm. Check this is OK, and the rotor cap is fine, too. As above, check the leads are OK and in the right order.
Check the gap for the plugs, and they are dry. They might need a quick clean with a wire brush. Put this all back as before, then try again.
s3fella said:
What engine year and miles is it?
I would say DME relay immediately. DME relay controls pretty much everything you need to start the car except the starter motor!
But a bit more info would help
What info would you like I can give you just about any info there is to give and the year is 1988 944 porsche 2.5 litre non turbo it has 117162 miles on but like I said I thought it was the dme relay as well but when gas got all the way to the fuel rail and had pressure I thought that meant the dme relay was good or am I wrong? I would say DME relay immediately. DME relay controls pretty much everything you need to start the car except the starter motor!
But a bit more info would help
If you have consistent sparks & fuel then it won't be the DME relay as that switches both. If you have lots of fuel then it could be a regulator issue, this would also means it starts up & runs for a short while. Try drying the plugs, pull the fuel pump relay & spin it over. Then replace plugs & see if it'll start then. Assuming you have compression, fuel & spark then it must start & run!
9za4ck4 said:
s3fella said:
What engine year and miles is it?
I would say DME relay immediately. DME relay controls pretty much everything you need to start the car except the starter motor!
But a bit more info would help
What info would you like I can give you just about any info there is to give and the year is 1988 944 porsche 2.5 litre non turbo it has 117162 miles on but like I said I thought it was the dme relay as well but when gas got all the way to the fuel rail and had pressure I thought that meant the dme relay was good or am I wrong? I would say DME relay immediately. DME relay controls pretty much everything you need to start the car except the starter motor!
But a bit more info would help
Oh, and if you were trying to be a smartarse, with people giving up their time to help, I hope you don't get it running.
tr7v8 said:
If you have consistent sparks & fuel then it won't be the DME relay as that switches both. If you have lots of fuel then it could be a regulator issue, this would also means it starts up & runs for a short while. Try drying the plugs, pull the fuel pump relay & spin it over. Then replace plugs & see if it'll start then. Assuming you have compression, fuel & spark then it must start & run!
so you want me to turn it over with the fuel pump relay out and the plugs out to? Then put them back and it should start? I have just recently unplugged the injectors and my car started and it lasted for about 10seconds....my battery is now charging so itl be a few Mins before I can give it another go s3fella said:
9za4ck4 said:
s3fella said:
What engine year and miles is it?
I would say DME relay immediately. DME relay controls pretty much everything you need to start the car except the starter motor!
But a bit more info would help
What info would you like I can give you just about any info there is to give and the year is 1988 944 porsche 2.5 litre non turbo it has 117162 miles on but like I said I thought it was the dme relay as well but when gas got all the way to the fuel rail and had pressure I thought that meant the dme relay was good or am I wrong? I would say DME relay immediately. DME relay controls pretty much everything you need to start the car except the starter motor!
But a bit more info would help
Oh, and if you were trying to be a smartarse, with people giving up their time to help, I hope you don't get it running.
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