924Board.org

Mike77 · Joined: 14 Dec 2002 Posts: 103 Location: PA

Things have changed drastically on my 924. I discovered the vacuum hose between the intake and aux. air valve was leaking so I replaced it. The vacuum leak affected the timing, and the mixture, which threw off my fuel consumption (it was awful that first week of driving it) and made it flood on restart, since I was pushing the hot start button adding even more fuel. It had no power, and ran too hot (which thinned the oil and caused low oil pressure). I reset the timing and mixture which made a BIG increase in power, it's running cool, the oil pressure is great, and it restarts when hot with one quick push of the button. By replacing that one leaking hose, and resetting everyting. a whole string of problems cleared up!
Just a reminder that sometimes a simple problem causes alot of trouble that APPEARS worse than it is. I was ready to bail out last week since it appeared that this car had a whole bunch of potentially serious problems. It's still burning rich in one cylinder, but not fouling the plug. I may try some hotter plugs.
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Mike

64 Volvo 1800s

jpab924 · Posted: Tue May 06, 2003 4:19 am Post subject:

ahhh, I recall being burned by the simple things before. Its always best to cover the basics.

good for you Mike!

NINEEAGLES · Joined: 25 Apr 2003 Posts: 219 Location: SW PA

its good to hear your success........I haven't put in my hot start switch yet and had trouble last night getting it started after a short drive....its still frustrating but I haven't been convinced that the hot start switch works....some say yes... some say no...I guess I will attempt it...

jpab924 · Posted: Tue May 06, 2003 5:07 am Post subject:

I use a toggle switch which bypassed the fuel pump relay to power up the pump. I had to do this when I upgraded to an msd igniton system. I suppose a setup like this could eliminate a hot start problem if you are having problems with a check valve. This is probably not legal in many states, but I don`t have to go through a complete inspection like some of you fellas. Just have to pass smog.

Lizard · Posted: Tue May 06, 2003 5:47 am Post subject:

NINEEAGLES · Joined: 25 Apr 2003 Posts: 219 Location: SW PA

Lizard....does this reroute of the fuel pump to a toggle work along with the hot start switch system or does it replace the hot start switch system?
I am still considering what to do about my hot start problem (79 924)..I haven't touched anything yet but waiting to see what transpires with other opinions....thanks

Roger · Joined: 06 Jan 2003 Posts: 1235 Location: Cordova, TN

I looked at the old post cant belive none of us suggested a vacum leak. It must feel good to have the car running good.

Congrats
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1981 924 NA

Some people are like Slinkies. Not really good for anything, but you
still can't help but smile when you see one tumble down the stairs.

Lizard · Posted: Wed May 07, 2003 1:34 am Post subject:

NINEEAGLES · Joined: 25 Apr 2003 Posts: 219 Location: SW PA

Lizard...thanks for the info....I ordered a fuel pump relay from a company in NJ. and recieved it the next day....only $16 plus shipping...I will look at home later and find the name of the company...I would be glad to order it for you if you can't get it where you are....and send it to you....thanks

Lizard · Posted: Wed May 07, 2003 5:47 am Post subject:

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

I'm sure you will all call me a sissy for bringing this up, but I thought it might be relevant. When I first bought my car, the PO had wired the fuel pump to a switch in the cockpit because he didn't want to get a new relay. I bought a new relay and removed his switch. The reason I did this was because of my fear that if I was ever in a crash and I was knocked unconscious, I wouldn't be able to shut of the fuel being pumped into the engine bay which could feed a fire. My understadning is that in a severe accident, the engine is typically smashed enough to stop running and the fuel pump relay turns off the fuel flow when the engine stops. I may just have an irrational fear of being burnt.
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1987 951 - M193 Version for Japan

Lizard · Posted: Wed May 07, 2003 6:43 am Post subject:

yah maybe you are just a fraidy cat

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3 928s,

Roger · Joined: 06 Jan 2003 Posts: 1235 Location: Cordova, TN

924martinirossi · Posted: Wed May 07, 2003 2:15 pm Post subject:

I agree with fixing it right,which leads me to; Why don't you fix the hot start problem right the first time?

Michael

See my response to fuel problems elsewhere at the 924.org.

Roger · Joined: 06 Jan 2003 Posts: 1235 Location: Cordova, TN

Did Chrenan also have a hot start problem? Or are we talking about Mike77?
_________________
1981 924 NA

Some people are like Slinkies. Not really good for anything, but you
still can't help but smile when you see one tumble down the stairs.