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924martinirossi · Posted: Thu Nov 28, 2002 3:57 pm Post subject: No Starting

Well, wouldn't you know it. Car ran fine after adjusting the fuel/air and idle speed mixture. Drove it around the block and all was OK. Tonight I drove it to the store and the car wouldn't start.

Fuel pump runs. Also tried a straight jumper and pump ran. Pushed down on the air meter plate and cranked the car, no start. Checked spark at each tower on the distruibtor. All towers spark to ground. Checked #1 plug wire for spark and it sparks.

It doesn't even try to start, even with with fuel in the cylinders and known good spark.

Is it time to by anither car?

Michael

(Only breaks down away from home)

Lizard · Posted: Fri Nov 29, 2002 1:12 am Post subject:

the only thing I can think of is the timing belt could have skipped or the distributor cap could have turned not sending spark at the right time
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3 928s,

924RACR · Posted: Fri Nov 29, 2002 1:44 am Post subject:

No. Welcome to the joy of the turbo!

In spite of all the lovely electronics to keep the thing running properly, I've still managed to flood these cars, or to foul the plugs.

I'm sorry I don't have any really good advice here. However, I did note an interesting comment in the owners manual - when it's really hot out, you have to hold the accelerator full down when starting - or should.

My only recommendation is to continue to try to tune it, get the base idle and mixture settings right. That's what I'm going with, I've had odd running issues too, as you know!

Good luck...
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

924martinirossi · Posted: Fri Nov 29, 2002 4:43 am Post subject:

I found that if I adjusted the fuel towards the lean side the car would barely try to start, alittle more, about 1/4 turn got the car to sputter more. I turned the airbypass screw CCW a few turns and turned the mixture screw about another 1/4 turn and the car started and had rough idle.

I then turned the mixture screw another quarter, reved the engine and it sorta back fired, ah... too lean. A little more CW twist on the screw and set the idle screw to 1,000 rpm's and the car didn't hesitate at all on the way home.

I shut off the car and then tried to restart and guess what? It didn't start so I have to go thru the whole procedure again. Anybody have a CO meter to loan? If I could figure out some basic settings, it would probally aid in troubleshooting.

Michael

Paul · Posted: Fri Nov 29, 2002 8:39 am Post subject:

Anytime I have this problem, I try a fresh set of spark plugs before anything else. I would spend the 4 bucks and 10 minutes.

924martinirossi · Posted: Fri Nov 29, 2002 9:08 am Post subject: Mixture adjustment

Just went out and turned the mixture screw CW alittle at a time untill the car started. Then I turned the mixture screw 1-2 times CW. The car really blew blackish smoke. I then turned it CCW untill the idle droped and the smoke disapeared. I turned it more CCW untill the car stumbled and backfired on acelleration. Then slowly turned it CW until the backfire disapeared. Turned off car and it restarted.

Just passing along info.

Michael

924RACR · Posted: Mon Dec 02, 2002 3:29 am Post subject:

Good info, thanks! I also wish I had access to a CO meter; this is great info for the rest of us to dial in that mixture...
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype