fuel injectors

[suburbanjosh]

I have a 1988 4wd 1/2ton suburban with a 350 and tbi. Im just wondering how much fuel is supposed to be coming out of the jets when they are shooting out. Currently im geting a strong fuel smell and after changing the o-rings i no longer have a leak, but i still get a strong smell, while fixing the o-rings i noticed the jets look like they spit out a lot of fuel and wondered if that could be why i smell it so strong. Also wondering if to much fuel could cause something to leak.

[2000CAYukon]

The ECM will increase fuel based on inputs from the MAP, 02 and TPS.

If the MAP is bad (will not hold a vacuum or returns wrong value), the ECM could send too much fuel. I also had an issue recently where the vacuum hose to the MAP would not hold a vacuum causing problems.

A bad O2 can cause the ECM to think the engine is running lean and give it more fuel.

If you have access to a scan tool, it would be a good idea to see what the MAP, O2 and TPS are doing.

//2000CAYukon

[suburbanjosh]

is it possible to scan an 88

[2000CAYukon]

Originally Posted by suburbanjosh

is it possible to scan an 88

Yes. I use WinALDL (try a google search to learn more) on a laptop and a special cable (http://www.akmcables.com/ic.htm). WinALDL is limited but does give me the basics.

A scantool can do a lot more and can help determine why you are running rich.

//2000CAYukon

[Willyswagn]

Keep us informed of the situation and solutions. I am having the same problem with an 89 burb.

Originally Posted by suburbanjosh

I have a 1988 4wd 1/2ton suburban with a 350 and tbi. Im just wondering how much fuel is supposed to be coming out of the jets when they are shooting out. Currently im geting a strong fuel smell and after changing the o-rings i no longer have a leak, but i still get a strong smell, while fixing the o-rings i noticed the jets look like they spit out a lot of fuel and wondered if that could be why i smell it so strong. Also wondering if to much fuel could cause something to leak.