85 GMC choke

I recently picked up an '85 GMC Wrangler. It has the 305 and an automatic.

When the motor is warm it starts like nothing. When it's cold, I pump the pedal twice and it fires up, but it sounds like it's choking itself hard. If I keep my foot on the pedal for a good 30 seconds it will run on its own after that, but if I didn't do that it would just choke itself out.

I was told the problem has to do with some kind of vacuum operated choke thing near the carb. I guess it's a TBI motor? I haven't even looked at it close, and I'm not really familiar with fixing chevies to begin with so. I know it's not fuel injected.

When it's warm it starts good, so I don't think it has any vacuum leaks anywhere. I'm thinking that this choke apparatus is bad.

Anyone know from experience? I was going to take it to a GM mechanic but if it was something I could fix myself I would just do it. I don't really know too much about GM stuff.

1. If it's a TBI, it doesn't have a carburetor;

2. If it's truly a "Wrangler," then it's a Canada-specific model;

3. If it's a Canada-specific model built in the 1985 model year, it had (from the manufacturer's perspective) "Export Emissions Certification", and would have a carburetor, not TBI.

Establishing that, there is a high idle cam on the right side of the carburetor which may need adjustment to maintain idle speed on cold starts. Before adjusting anything, however, make sure the linkages are cleaned and lightly lubricated. After everyting is clean and frely moving, Verify that the choke pull-off is connected to its vacuum source and is functioning. If it is functioning and adjusted properly, it should pull the choke plate open via its linkage rod to about 3/16" (5mm) to prevent flooding once the cold engine has started, eh.

You can find quite a lot of good information on rebuilding and adjusting your E4ME carburetor at:

http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/16/3b/24/0900823d80163b24.jsp



And supporting information here:

http://www.carburetorfactory.com/evindex.html

http://www.carcraft.com/howto/57178/

Thank you for the information, I appreciate it.

It's a real Wrangler. It's got the Wrangler badges on the front fenders and Wrangler stickers on the box.