Won't start, first time

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golf-reub
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Joined: Sun Feb 10, 2019 8:32 pm
Drives: 1989 MK2 Golf GTi

Won't start, first time

Postby golf-reub » Sun Feb 10, 2019 9:08 pm

Hey! I've recently acquired an '89 MK2 GTi. 150k, new clutch, starter, battery, fluids, dizzy cap and rotor.

So far it's been amazing, but it has an odd starting problem - would be great to get some advice on it.

So here's what happens:
- from cold, when i start it, it turns over nice and quick but just doesn't fire at all. I can turn it over for 30 seconds, nothing.
- turn the ignition off, back on and start it. Catches immediately, and runs a treat.
- from hot, if i turn the engine off, it will start again no problem.

Generally it runs really nicely, it will just never start on the first try. Does anyone have an idea of where i should start to investigate?
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Monkey
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Re: Won't start, first time

Postby Monkey » Mon Feb 11, 2019 12:20 pm

It kinda sounds like a fuel issue.
can you hear the fuel pump prime when you turn the ignition on before firing the car?
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golf-reub
L-Driver
Posts: 2
Joined: Sun Feb 10, 2019 8:32 pm
Drives: 1989 MK2 Golf GTi

Re: Won't start, first time

Postby golf-reub » Mon Feb 11, 2019 2:02 pm

Hey monkey, yes I can hear the fuel pump buzz then stop after a couple seconds, every time i turn the ignition on.
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Monkey
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Re: Won't start, first time

Postby Monkey » Mon Feb 11, 2019 3:14 pm

Ok, if we go back to basics, an engine only needs air, spark, fuel, compression and timing to start.
We know that you have timing and compression as it starts and runs on the second attempt.
It'll have the air as it'll probably splutter if there wasn't enough.

So it's either the fuel or the spark being dodgy.

If your pump is running, there probably is fuel getting there, leaving us with spark.
One thing I have just thought of, it could be the ignition switch, maybe on the first attempt, the switch can give the starter life, but not the ignition system. When you crank from cold, watch the dash, all the red lights should come on.
If not, your problem could be your switch, bit fiddly to install, but they're only about a tenner online.
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Mk2 Driver
Mk2 Silver 8v
Corrado G60 Turbo
Mk2 Red 8v
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Bora 20vt
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Mk2 Green ABF
Mk2 BBM 20vt
3.2 TT Roadster
Mk2 Red 16v
225 TT Coup
3.2 TT Coup

Mk2 BBM R32
Mk4 Anni Derv


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