924Board.org

Dan924S · Joined: 04 Jan 2003 Posts: 26 Location: Boca Raton, Florida

My 87 924s has no cataletic converter so it reeks like gas all the time. Are there any solutions to this besides put the CC back on(which of course I don't have)? Will a CC from an old 924 work? Would an MSD ignition system burn up more of that gas reducing the smell? On that topic, how much HP would an MSD actually add? If any of you remember from my old posts my motor is pretty tuned up with a performance cam, a chip, and the exaust. How much HP can this drive train or this motor take, especially considering the high mileage and advanced age? Thanks

Lizard · Posted: Thu Jan 23, 2003 3:03 am Post subject:

I doubt MSD will cure that, your exhaust shouldn't smell like gas though, get you fuel mix checked,

the thing about MSD is only really helps w/ high compression or boost, or if your ignition system is alittle weak.

but 2 suggestions, check fuel mix, and make sure you get a good spark
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3 928s,

dgz924s · Joined: 03 Nov 2002 Posts: 592 Location: Kansas

Dan, Has the car always reeked or just since removal of the CC? The 924S gas tank leaks are common. Rule out the tank first. Good place to start is the filler neck. D
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Dal Glassinger

Porschephile · Joined: 04 Nov 2002 Posts: 825 Location: Denver, Colorado

Is it easy to fix the problem with the filler neck? Mine has the gas smell in the summer (when it's nice and hot) and I assume it's from that... and I'd like to have it fixed. well, thanks for the help.
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werd B.

jcope · Joined: 05 Nov 2002 Posts: 157 Location: Littleton, CO

The gas smell problem on my car cost me $180 at Sterling Service off Broadway and C470. It was a leak around the feeder for the guage, or the feeder was no good. They replaced it. I believe they got to it from inside the car. If I had to do it again, I'd try to do it myself.

Joes924Racer · Posted: Thu Jan 23, 2003 11:04 am Post subject:

No you will notice a difference in starting and performance with the msd you should get the blaster coil along with the msd.. itll have more power climbing hills and passing is safe to say.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Thu Jan 23, 2003 11:26 am Post subject:

You know jcope once my tailights quite worken I didnt know what was wrong turned out to be the switches mounted on the master cylinder I took it to a shop had the electrical diagnosis goin costed around 80 bucks including the 13 dollar part... it was a couple of years ago and I didnt have the time to be driven with no tailights

diagnosis-A critical analysis of the nature of something.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Dan924S · Joined: 04 Jan 2003 Posts: 26 Location: Boca Raton, Florida

I bought the car about 3 months ago. The previous owner took the CC off. I know it's not the gas tank hoses. It could be a fouling plug, I guess. I did notice that my fuel filter is a bit leaky, but i think the smell is comin right out of the tail pipe. Anyway, how do I check fuel mix?

gohim · Joined: 02 Nov 2002 Posts: 4459 Location: Rialto, CA

If you can smell that much gas from your tailpipe, there is something wrong with the way that the engine is set up. Most 924S/944 engines will pass an emissions test without a cat, when running properly.

There isn't a "user" adjustable mixture control on the 924S/944 engine. There is an adjustment for "mechanics" on the AFM (air flow meter). THis adjustment is capped, and you have to remove the cap to get to the adjustment.

I would guess that the previous owner made more "modifications" to the car that you haven't found yet. The cat may have been removed because it was damaged from running too rich over an extended period of time. If you check the AFM, you may also find that the P.O. (previous owner) has already knocked the plug off the adjustment.

While you are down there, I would check the vacuum hoses , make sure that they are properly connected, and replace all of them, if any/many of them are damaged.

Take care of the fuel filter leak immediately. You may find that the leak is not the fuel filter, but actually the hose that feeds the fuel rail. I have seen many 924S and 944 cars from this model year that have burned because that hose/connection leaked. I think there may still be an open RECALL if Porsche has not replaced the hose on your car. Check with a Porsche Dealer.

Also make sure that your car is up to date on the "front of engine service". If you are not aware, this MUST BE DONE every 30K miles, or 3 years (which every comes first). If you don't have this done on time, the odds are, something on the front of the engine will die, and you will lose the timing belt (and the engine).

jcope · Joined: 05 Nov 2002 Posts: 157 Location: Littleton, CO

You actually can wait until 31K miles if you want. We need another parts car around here.

I think the odds are that the leak is where everyone else's leaks are. Around the tank. Filler neck or feeder. That is if your leaky fuel filter isn't the entire problem.

I can recommend a book describing the Motronic fuel injection system, if you want. It's not "for dummies", but it's more basic than gohim would enjoy. Good for most of the rest of us. I think it should be required reading for anyone with a 924S.

Lizard · Posted: Sat Jan 25, 2003 4:34 am Post subject:

hey Jcope you must have had fun trips with all those gas fumes

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3 928s,

jcope · Joined: 05 Nov 2002 Posts: 157 Location: Littleton, CO

I don't really remember. People tell me I had fun.

Morrie · Joined: 05 Nov 2008 Posts: 25 Location: Austin, Texas

Hi Guys,

I recently cured my fuel smell by replacing the high pressure fuel lines back by the pump which had gone spongy and were weeping fuel. Scarie stuff and I am glad Porsche ran the fuel lines on the opposite side of the car from the exhaust.

I want to upgrad the ignition and have a couple questions on exactly what to get. I believe for MSD I need the following but would appreciate it if you guys could let me know if I have it right.

MSD 6A Ignition Control
MSD Blaster 2 coil
MSD tach adapter?

I believe the rev limiter is taken care of elsewhere so no advantage to the 6AL....
I believe the Blaster 3 has the wrong HV connection for my stock style (but new) plug wires.
I am not sure if I need the tach adapter but suspect the answer is yes.

OR

For my street application would I be better off with just the Blaster 2 coil and save my money for something else on the other multi spark parts.

Let me know what you think!

Morrie

bcblase · Joined: 23 Oct 2007 Posts: 574 Location: Winchester, VA

You've just revived a 6-year old thread... is that a record?

BC
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1987 Porsche 924S - track toy
1986 Mercedes 190E 2.3-16v - autocross
2007 F-150 5.4L Lariat Supercrew - tow beast
1994 Volvo 850 Race Wagon - 24 Hours of Lemons Car
2001 BMW 325xi - daily driver

Morrie · Joined: 05 Nov 2008 Posts: 25 Location: Austin, Texas

It should at least show I tried to find the answer... that ought to be worth something.

Morrie