924Board.org

[porsche87]

Hello everyone.


I own a 1987 Porsche 924s Ive had it since 1996. Its been sitting in my drive way all these years because its always had the same problem.


The engine turns but doesnt start unless i spray carb fluid in the intake.

I checked the injectors and they are recieving signal.

I replaced the fuel pump 3 years ago and nothing.

I checked the fuel rail to see if gas is getting up there and it is.

Please help me im dying to drive it. I feel horrible having it sit there all these years.

Thank you,
Adrian
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Adrian

[Rasta Monsta]

Fuel in the rail, and adequate fuel pressure to fire the injectors are two different things. Since it fires on starting fluid, I would test the pressure on the rail while cranking.

Also, if it really has been sitting for 15 years, you need to replace the timing and balance shaft belts before proceding any further, or all your effort in getting it running could very well be for nought.
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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[mehall]

I'll bet you will wish you found this (and other) sites before now. There is wealth of info here and some very knowledgeable people here.

Have you checked the DME relay?

If you can start with manually supplied fuel, it rules out many electrical issues, but not all. If you haven't discovered Clark's Garage online, do so. You many not know that your car is extremely closely related to the 944. I would recomend reading up on the DME relay...

www.clarks-garage.com

Select "Garage Shop Manual" and find the DME relay entry. It explains the function the relay, it's electrical circuit and....best of all....how to build a DME relay tester and emergency starter with 3 short wires. I built mine with a simpe rocker switch so I can drive to haven and still turn off the fuel...sort of like a security switch.

This relay has a nasty habit of shutting down and leaving people stranded. A new one costs about $30 and most of us carry a spare in the glove box. Auto stores carry or can order them, but be aware that they will often know it as a fuel pump relay. However, it controls several other functions, but the fuel pump is the one we notice first.

There are some other online resources:

Rennlist.com
Pelicanparts.com
Paragon-parts.com

Look for their forums for the best help. There are many others.
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Mark

'87 White 924s manual
'94 Lexus LS400

www.kcws.org

[mehall]

Oh...I am not one of the knowledgeable & helpful I mentioned. My suggestion is not the only possible solution....

Rasta Monsta is one of those people.
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Mark

'87 White 924s manual
'94 Lexus LS400

www.kcws.org

[joecitizennn]

[mehall]

I hadn't heard that you could start it with ether if the sensore were bad. I knew you could get the engine the burn the ether if the DMS relay wasn't working, but it would quit as soon as the starter fluid was consumed.

Never tried it when mine wouldn't start. Might have showed up where the problems were.
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Mark

'87 White 924s manual
'94 Lexus LS400

www.kcws.org

[porsche87]

I replace the DME like 4 years ago. Im going to test the fuel pressure on the fuel line and see if it good.
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Adrian

[Rasta Monsta]

P.S. I am serious about the timing belt. You could get it running then lose your motor the first time you drive it.
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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[porsche87]

How difficult is it to replace the timing belt and what is the cheapest and best way to find 924 parts.

I appreciate everyones help.

Thanks
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Adrian

[Rasta Monsta]

Paragon Products, Zim's Autoteknik and 944Online all have kits to replace timing and balance belts, rollers, seals, and water pump.

I don't find the procedure to be especially difficult, but it requires patience and a number of specialized tools. I don't think I would recommend it to a novice mechanic.

If you want to read about the procedure, stop by Clark's Garage.
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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[mehall]

I wasn't talking about the DME.

I was refferencing the relay in the fuse & relay farm under the dash just over the clutch pedal.
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Mark

'87 White 924s manual
'94 Lexus LS400

www.kcws.org

[headstrong2740]

Any updates on this ?

I was also thinking if the coil tested ok and was not the issue, you should check voltage regulator.
This i have seen in past cause problems with cars not starting. One was a road runner i worked on in my shop class. everything seemed fine on it until we finally checked it.. was bad.. replaced and fired up no problem.

Last I knew these were equipped on these cars and could be a problem to look at as well.. just food for thought.

but than again.. you did say it starts or does it kinda pop and churn a little when you spray carb cleaner or starting fluid???

could be out of time.. or your distributor is faulty or loose... or a sensor is bad that is keeping it from getting a good signal allowing it to start... id still check the voltage regulator.. easy to test at your local auto store (autozone for one can easily) but also check any referance sensors that would keep a good spark from occuring or even fuel delivery.

I believe some cars (not sure about ours) used a crank and cam sensor to control the life to the fuel or spark. so if one was dead your car would not start... again this is a porsche and i myself an still learning what is on it.. but if your spark and fuel systems are functioning correctly and test ok.. key words are test ok... then you might want to start looking at any ref. sensors that would control these.

Another think to think about would be ground wires as well... bad grounds can have all sorts of problems with starting a vehicle. And if its been sitting for all these years (since 96 if i read right) then i would for sure check that.

Why not check your timing as well while your at it. If its off.. you might have more issues to deal with (valves and piston damage).

test the things that are easy to test either on the car or can be easily removed and taken to be tested (electrical sensors and what not) to save you time and money.
This means allso checking your timing... get the engine in TDC and make sure your marks all line up.. if they are off... then you can see what the problem is instantly.. no compression will build up alowing for a good combustion (give you a pop and churn) with bad valves

Just some things to think about.

Give us an update on what you have so we can offer more advice or idea. sorry if my ideas are kinda of random and all over the place

Good luck and hope you getting running soon.... and dont forget to change your belts but im sure others have already mentioned that
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1987 924s "Enzo"
2002 1.8t VW Passat
http://porsche924resto.shutterfly.com/ - follow the progress of "Enzo"

[mehall]

Well...It's my turn.

My car was running odd for a couple of weeks, but work deadlines were restrcting my wrenching time. Now, it's nearly dead. Last night on the way home, it started losing power and then left me dead by the roadside. Thankfully, I was close enough that the tow company knows my State Farm agent and will bill him directly...

Symptoms:

Has gotten harder to start, requiring more cranking time before it fires, then was rough for about30 seconds (like it was running on 2 or 3 cyl) then it would run all cyl but still had a rough idle.

When running warm, it seemed unwilling to go. It went OK, and even passing well on 2 lane roads. But it didn't feel right, maybe low spark or low fuel preasure.

Fuel usage rose. Can't say how much because I have het to repair the odometer.

Finally, last night I had a 35mi trip home. It started as hard as before and ran a bit rougher, but we headed home. I was going slow (~40) just taking a lazy 2 miles to jump on the 4-lane. Suddenly we started slowing, with poor to no throttle response then 2 coughs and dead. I coasted down the grade to stop at a park. I was glad to be off that narrow road.

It turns over OK and after a while, it will fire a few times then die. It acted more like a empty tank than anything else, so I called my neice (nearby) to bring me some gas. It didn't help.

Called for a tow to my hone.

One other thing that may be related. For the last couple of months, sometimes the started doesn't respond wheh I turn the key, but has alwas turned over on the 2nd try.

Where would you start?
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Mark

'87 White 924s manual
'94 Lexus LS400

www.kcws.org

[joecitizennn]

Check fuel pressure.

Check fire.

Check wallet.
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87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold

[headstrong2740]