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starting problem on 1984 carrera

car sat for about 3weeks now it wont start. i can smell gas to i think the injection system is working and my best guess is that its not getting spark. it there any common problems on this car it has the 3.2 is there anything i should check first. any help would be awsome.

Old 10-11-2005, 03:36 PM
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DME relay (under driver seat) replaced recently? also check cylinder head temp sensor is updated to multi-wire one. Otherwise after determining why there is no spark the timing reference sensor may be malfunctioning (came loose from mount on top of flywheel?
Old 10-11-2005, 04:15 PM
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Hi,

I'm a big believer in the DME relay going bad. The DME itself is fairly bulletproof, but the DME does control fuel, spark, and seems to have protection built in to not let the car start if it does not sense everything is happy... Sorry, getting late in my day and I am very tired...

Dave
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Old 10-11-2005, 04:21 PM
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Gas smell means flooded intake. Did you step on gas pedal by mistake before cranking?
Old 10-11-2005, 04:39 PM
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smell of gas + no spark = likely bad DME relay. Our host sells them.
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Old 10-11-2005, 06:26 PM
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Don't think that the DME itself won't go bad. I just had mine replaced on my '84 this past week!
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Old 10-11-2005, 07:21 PM
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Quote:
Originally posted by kilodawg
Don't think that the DME itself won't go bad. I just had mine replaced on my '84 this past week!
True, but the relay is a cheap first place to start. If it's never been replaced, it's a likely suspect.
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Old 10-11-2005, 07:24 PM
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Oh no argument from me just commenting to slodave's post. Figures my original relay still worked it was the DME itself that failed. How nice.....
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Old 10-11-2005, 07:34 PM
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"smell of gas + no spark = likely bad DME relay." - scottb -

Not tue! The DME relay has two functions; DME ECM power & fuel pump power.
To smell fuel indicates that the pump is working & the injectors are spraying.
Since the DME relay supplies power to the DME ECM which provides fuel AND spark,
the most likely problems for no spark are:

1. no coil power - use test light to check
2. bad coil - use test light to check for flashing signal
3. bad coil wire
4. bad cap and/or rotor
5. bad DME ECM

For additional insights, check here ( www.systemsc.com/diagnostic.htm )
under No Start.
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Last edited by Lorenfb; 10-11-2005 at 08:33 PM..
Old 10-11-2005, 07:39 PM
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Hi,

The DME is solid state. Those type of devices don't really go bad, but everything has to keel over at some point.

kilodawg: Too bad it happened to be your DME. Noticed you are from Florida, could humidity have been the culprit? Moisture has a nasty habit of killing electrical devices.

Anyway, glad all problems (hopefully) on this thread are gone - on to the next one....

Dave
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Old 10-11-2005, 07:44 PM
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That was my problem Loren. Being new to this I smelled fuel but tried the relay first. I was lucky enough to jump all the way to 5 on your list.
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Old 10-11-2005, 07:45 PM
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Quote:
Originally posted by Lorenfb
The DME relay has two functions; DME ECM power & fuel pump power.
Well, I learned something new today. Thanks, Loren!
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Old 10-11-2005, 07:45 PM
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Slowdave, humidity? Two miles from the beach after a summer filled with tropical depressions and storms. No way.... Okay way. Sad part is I started using damp rid in the car a couple of weeks before I tried to start it last. I guess I had the right idea but just a little too late..
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Old 10-11-2005, 07:48 PM
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Hi,

I am under the impression that the DME also does some basic checks to see if all is O.K. and if not, it prevents the car from firing-up. It's not a true computer, but it is the heart of the mid to late 80's p-car.

I'm not offended, but it is actually SLODave - San Luis Obispo. Was going to school there and adopted the nickname early in the 90's on AOL (yuck).

I really don't do anything 'slowly'.

:-)

Dave
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Make sure to check out my balls in the Pelican Parts Catalog! 917 inspired shift knobs.

'84 Targa - Arena Red - AX #104
'07 Toyota Camry Hybrid - Yes, I'm that guy...
'01 Toyota Corolla - Urban Camouflage - SOLD
Old 10-11-2005, 07:55 PM
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Thanks for the tip Loren!

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Old 10-11-2005, 08:05 PM
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