starting problems, just turning over

[95mushroom]

Hello, new member, lol.

Anyways, my 95 is developing a starting problem. It did once a while ago I and never gave it a thought. But now it seems more common.

Whats its doing is that after like an hour or two of sitting after driving, the engine just turns over and times an ungodly amount of time to fire up. Then I guess, two or so cylinders grab and pull the rest of the engine to start. I'm thinking it has something to do with the fuel as it turns over nicely. Also, the cure-all for this Aurora's seems to be the Fuel Pressure Regulator which I havent replaced yet. I just did plugs/wires/coils last week so it cant be anything that way.

Anyone else have an idea?

[Indy8]

Yeah, what kind of plugs? Gapped at what? Please read my post in the "Valuable Northstar" thread.

[dafrazi]

I had the same problem. It wasn't easy to trouble shoot. I replaced the fuel pressure regulator but the slow starting problem persisted. What finally tipped me off was a gas smell around the fuel injectors. I took it to my mechanic who said there was a pin-hole in the fuel rail. Hopefully for you it is the pressure regulator becuase the fuel rail isn't cheap-about $350.

[Indy8]

If you need it, get the GM metal upgrade rail kit. $135, take you a couple of hours.

[RorthStar]

I had a simfuel pumpilar problem also. Turned out to be the fuel pump. Easy fix, you don't even have to drop the tank! Unfortunately, it's a 200 dollar part! part no 25029709. Anyway, hope you find out what the problem is! later!

[Indy8]

RorthStar, how did you R&R the fuel pump w/o removing the tank? The dealer insists that tank has to come out to do this. And what is acceptable fuel pressure in PSI?

[jjdewd]

thought I read you can access the fuelpump through the trunk

[Bill V]

There is a nice tin plate in the right side forward area of the trunk. It is under the mat. Easy to access, but you need a special tool to remove the sender lock ring.

[Indy8]

Originally Posted by Bill V

There is a nice tin plate in the right side forward area of the trunk. It is under the mat. Easy to access, but you need a special tool to remove the sender lock ring.

That's right.....now I remember someone saying to be patient using a small punch and hammer to loosen it.

[BKVic]

Indy8

According to ALLDATA the fuel pressure for a 97 Aurora should be between 48-55 PSI. I would guess that it would be the same for the other years between 95-99.

BKVic

[Indy8]

That's pump pressure, measured before the reg.,or what the reg. should be sending? I was wondering what min. acceptable pressure is when checking for a bad pump.

[BKVic]

Thats what you should be reading at the fuel rail while the pump is actually running. They say you may have to cycle the ignition switch off and on a couple of times to get the highest reading. The fuel pump should run for about 2 sec each time you cycle the switch to off and then on agian. I tried to cut and paste but the ALLDATA site wont allow it, Sorry.


BKVic