MK4 golf 1999 model 1.8 no start but cracks and have spark

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ghistCEY
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MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by ghistCEY » Sun May 12, 2019 11:54 am

Hello guys,

I have MK4 golf 1999 model 1.8 no start but cracks and have spark, I previously had issue with an ECU and broken coil but replaced both of them but still no start checked the relay and tested them they OK. changed all the fuses to new ones still no start but still crack. did the compression test it goes to 90 to all of them..fuel is coming up when cracking.I'm desperate for help. The ECU does not read on the scanner but still sparks all the leads have spark, i have also took out the radio (disconnected it at all). please help
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panic-mechanic
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Re: MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by panic-mechanic » Mon May 13, 2019 6:35 am

is therefuel pressure, is it pulsing the injectors , is there compression, is the cam timing correct.
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ghistCEY
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Re: MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by ghistCEY » Tue May 14, 2019 7:33 pm

panic-mechanic wrote:
Mon May 13, 2019 6:35 am
is therefuel pressure, is it pulsing the injectors , is there compression, is the cam timing correct.
All listed has been checked
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Re: MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by panic-mechanic » Wed May 15, 2019 12:47 pm

Then it will run.
Every engine needs the basics
air
fuel - right quantity at the right time
compression ( which by definition includes cam timing)
Spark at the right time - which by definition includes ignition timing and firing order.
If all of that is present it will run.
Something is missing which is why it isn't running.
Also I am assuming by cracks you actually mean CRANKS ie. it is being turned over by the starter but is not firing.
Stephan van Tonder - Jhb - Putfontein Benoni
'07 Audi S6 V10 - beast !!!!!
'05 Audi A6 3.0L TDI Avant
'09 Audi Q5 3l tdi
'95 Audi 90 coupe quattro
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
ghistCEY
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Re: MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by ghistCEY » Thu May 16, 2019 10:21 pm

Hi

I will have a look at maybe one is missing but also check my fuses all are working and being placed correctly.

could it be spark plugs too?
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Re: MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by Trishen94 » Thu May 16, 2019 11:32 pm

ghistCEY wrote:
Thu May 16, 2019 10:21 pm
Hi

I will have a look at maybe one is missing but also check my fuses all are working and being placed correctly.

could it be spark plugs too?
The plugs woulda been the first thing I woulda checked/changed
Current :2008 mk5 gti manual

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Re: MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by panic-mechanic » Fri May 17, 2019 8:36 am

Plugs are part of the SPARK at the right time equation. You said all of that was checked so I am doubting your statement.
Stephan van Tonder - Jhb - Putfontein Benoni
'07 Audi S6 V10 - beast !!!!!
'05 Audi A6 3.0L TDI Avant
'09 Audi Q5 3l tdi
'95 Audi 90 coupe quattro
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
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Re: MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by ghistCEY » Fri May 17, 2019 9:29 pm

The guy was using the multi meter to check them , so i was confident that there working. Thanks a lot panic machanic, i will change them in the morning and and get back to you
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Re: MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by panic-mechanic » Mon May 20, 2019 10:49 am

You test a spark plug by letting it sit on the engine and cranking it. Not using a multi meter.
Stephan van Tonder - Jhb - Putfontein Benoni
'07 Audi S6 V10 - beast !!!!!
'05 Audi A6 3.0L TDI Avant
'09 Audi Q5 3l tdi
'95 Audi 90 coupe quattro
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
ghistCEY
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Re: MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by ghistCEY » Thu May 23, 2019 10:11 pm

I have changed the spark plugs to new ones but still no start
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Re: MK4 golf 1999 model 1.8 no start but cracks and have spark

Post by panic-mechanic » Fri May 24, 2019 7:15 am

so changing stuff is not how you fault find. You have to TEST. Spark is but one part of the equation - what about the others.
And quite recently people have said - we tested X and it works - sending everybody in another direction only to come back later and say - oh it was X.
Stephan van Tonder - Jhb - Putfontein Benoni
'07 Audi S6 V10 - beast !!!!!
'05 Audi A6 3.0L TDI Avant
'09 Audi Q5 3l tdi
'95 Audi 90 coupe quattro
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
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