1.8 (DX engine) fails when hot
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#1610193
(In Topic #219814)
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Posted
Local Hero
How old is the ignition side of things, eg spark plugs, HT leads, dissy cap, rotor arm?
What car do you have a tin top or cabriolet and what year?
Are you losing/using and coolant?
Does the fuel pump make more noise when it's jumping down the road?
What car do you have a tin top or cabriolet and what year?
Are you losing/using and coolant?
Does the fuel pump make more noise when it's jumping down the road?
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
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Local Hero
Test all HV leads for Spark.
Take Photos of the Engine, and Diz area and post them.
Model and Year of your car is also nice to know, yes with all the Frankensteining of these guys since they were oem, all things are possible.
So not starting when hot is different on different years and engines…. ie: Coil, FPR, WUR, 5th injector, Vapor Lock…. Bad ICM or Dizzy HV lead. I had one car that had 1 bad new out of the box plug (bosch), and my original issue was a bad HV lead…. Try having 2 sets of Bosch NEW plugs with bad plugs in each…. then originally having a bad HV lead so you were really running on one cylinder….
I was glad to have a running Cabriolet as a Spare as when it showed up I changed all over and my bad car ran great. So I was able to tell the bad plugs as they never fired, but the HV leads I found the bad one…..
So as I stated knowing the Year, Model, and CIS, Carbed or Digifant is all relative to me.
Take Photos of the Engine, and Diz area and post them.
Model and Year of your car is also nice to know, yes with all the Frankensteining of these guys since they were oem, all things are possible.
So not starting when hot is different on different years and engines…. ie: Coil, FPR, WUR, 5th injector, Vapor Lock…. Bad ICM or Dizzy HV lead. I had one car that had 1 bad new out of the box plug (bosch), and my original issue was a bad HV lead…. Try having 2 sets of Bosch NEW plugs with bad plugs in each…. then originally having a bad HV lead so you were really running on one cylinder….
I was glad to have a running Cabriolet as a Spare as when it showed up I changed all over and my bad car ran great. So I was able to tell the bad plugs as they never fired, but the HV leads I found the bad one…..
So as I stated knowing the Year, Model, and CIS, Carbed or Digifant is all relative to me.
What do Divorces, Great Coffee, and Car Electrics all have in common?
They all start with GOOD Grounds.
Where are my DIY Links?
They all start with GOOD Grounds.
Where are my DIY Links?
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Settled In
Check fuel system pressure or co2 mixture ?
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Old Timer
Why not take a plug spanner with you and when it misbehaves have a look at the plugs, you should be able to tell if it's only one cylinder, all of them, and if it's rich, weak, or neither. If it's one cylionder try swopping things around, leads, plugs, and if you can the fuel lines but only do one swop at a time.
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Local Hero
Is there a loud whine from the rear wheel arch area?
CIS or Carbed?
I would also think a bad in-tank pump, and or a bad Fuel pump relay . as when the car cools off, it works well?
Fuel pump relays are notorious over here for getting cold solder joints, so when they get toasty 20 minutes or so they fail as the solder doesn't make good connection, cools off reconnects, and runs till it heats up again.
In-tank pump can do the same thing as they stop up, causing the primary pump to over heat and fail,,, cools off for a while and starts to work…. The think here is that when the main pump starts to over work or heat up, it complains rather loudly about being over worked hence the whine.
CIS or Carbed?
I would also think a bad in-tank pump, and or a bad Fuel pump relay . as when the car cools off, it works well?
Fuel pump relays are notorious over here for getting cold solder joints, so when they get toasty 20 minutes or so they fail as the solder doesn't make good connection, cools off reconnects, and runs till it heats up again.
In-tank pump can do the same thing as they stop up, causing the primary pump to over heat and fail,,, cools off for a while and starts to work…. The think here is that when the main pump starts to over work or heat up, it complains rather loudly about being over worked hence the whine.
What do Divorces, Great Coffee, and Car Electrics all have in common?
They all start with GOOD Grounds.
Where are my DIY Links?
They all start with GOOD Grounds.
Where are my DIY Links?
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Settling In
Posted
Local Hero
Look at the guide for Fuel pump relays on www.cabby-info.com as there are a lot of iffy ones out there.
What do Divorces, Great Coffee, and Car Electrics all have in common?
They all start with GOOD Grounds.
Where are my DIY Links?
They all start with GOOD Grounds.
Where are my DIY Links?
Posted
Local Hero
Have feel of the fuel pump relay, does it get hot when things start to go wrong?
Might be worth carefully removing the relay (easy to pull the plastic top off) and give the connection a good clean.
Might be worth carefully removing the relay (easy to pull the plastic top off) and give the connection a good clean.
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
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Posted
Local Hero
Yes fuel relay in slot 2.
What number does it have on it if original VW?
You can try a different relay in the slot, 17, 18 or 100 to see if that works better?
more info here
https://vwgolfmk1.org.uk/forum/index.php?page=topicview&id=technical%2Ffuel-systems-and_3%2Ffuel-pump-relay
What number does it have on it if original VW?
You can try a different relay in the slot, 17, 18 or 100 to see if that works better?
more info here
https://vwgolfmk1.org.uk/forum/index.php?page=topicview&id=technical%2Ffuel-systems-and_3%2Ffuel-pump-relay
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
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Posted
Local Hero
Bit more info on relays etc here..
View topic: Fuze box wiring layout . Relay locations . Fuze locations . - The Mk1 Golf Owners Club
No 2 relay is early fuel pump relay without rev limiter built in according to info above.
The threads a is bit hard to find a fuse is spelt with a Z..
View topic: Fuze box wiring layout . Relay locations . Fuze locations . - The Mk1 Golf Owners Club
No 2 relay is early fuel pump relay without rev limiter built in according to info above.
The threads a is bit hard to find a fuse is spelt with a Z..
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
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