90 2.3 5 speed when starting up eng. fuel pump stays on causing to run rough and rich after a long while it finaly cuts off and runs ok also just recently got code 21 ect
Check the wiring around the EEC diagnostic plug. One of the ports is for the fuel pump. Make sure no one has spliced it to run all the time and make sure nothing is in the port itself.
Other than that, perhaps the relay is stuck open?
I have a similar problem but I get a code basically telling me the EEC doesn't know the Fuel Pumps are running. Mine has been chalked up to a wiring problem.
For
a small yearly donation, you can support this forum and receive a 'Supporting
Member' banner, or become a 'Supporting Vendor' and promote your products here.
Click the banner to find out how.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.