Home Technical Discussions Volkswagen Jetta, Golf, GTI: 1993-1999, Cabrio 1995-2002 (A3)

Volkswagen Jetta, Golf, GTI: 1993-1999, Cabrio 1995-2002 (A3) Hard starting when warm


Permlink Replies: 3 - Pages: 1
Last Post: Jan 8, 2013 6:32 PM Last Post By: tcovenant2000
bvolks73

Posts: 58
Registered: 10/10/07
Hard starting when warm
Posted: Jan 5, 2013 8:51 PM
  Click to reply to this thread Reply
My brother is having a starting problem with his 1997 Golf (1.8L). It starts great when it's cold, the problem is when it's warmed up and then shut off for only a short while. Sometimes it will take minutes of cranking to get it started and then he has to keep his foot on the gas to keep it going. It's also harder on gas than usual. Any ideas?
KasesAudi

Posts: 40
Registered: 01/23/07
Re: Hard starting when warm
Posted: Jan 6, 2013 12:56 AM   in response to: bvolks73 in response to: bvolks73
  Click to reply to this thread Reply
It could be a flooding condition or slow sart. If your engine temp sensor isn't giving the correct reading to the ecu, the ecu will think the engine is cold and dump too much gas into the cylinders.

Does the temp gauge work?
bvolks73

Posts: 58
Registered: 10/10/07
Re: Hard starting when warm
Posted: Jan 6, 2013 10:47 AM   in response to: KasesAudi in response to: KasesAudi
  Click to reply to this thread Reply
The temperature gauge is working normally (goes up to the halfway mark and stays there). He tried a temperature sensor from a parts car and it didn't make any difference. When it does start he said you have to play with the throttle to keep it running for a while and sometimes it idles way up and down for a while after it starts.
tcovenant2000

Posts: 1,802
Registered: 12/09/03
Re: Hard starting when warm
Posted: Jan 8, 2013 6:32 PM   in response to: bvolks73 in response to: bvolks73
  Click to reply to this thread Reply
The gauge has nothing to do with it. That's a separate sensor. There is a CTS (coolant temp sensor) that's likely to be the problem. That's what needs replacing. It's not expensive. Usually mounted on a flange and just has a clip holding it in place.
It's also possible your O2 sensor is failing. That's easy to troubleshoot. Just disconnect it. That puts the car into open loop mode. Drive it for a day or so and see if the problem goes away. If it does then the O2 sensor is bad.
Another possibility is the MAF. You can try dumping half a can of MAF cleaner into it. That often helps.
Oddly enough, another possibility is the air filter. Check that.

Thomas

Point your RSS reader here for a feed of the latest messages in all forums

Popular Discussions:
No popular dicussions.