Cadillac Seville / Cadillac Eldorado Forum Discussion, 99 sts running rough after warms up in Past Cadillac Vehicle Discussion; My neighbor just bought a 99 sts after it gets to normal operating temp starts running rough and the rpms ...
- 07-05-13 07:26 PM #1Cadillac Owners Member
- Join Date
- Mar 2012
99 sts running rough after warms up
My neighbor just bought a 99 sts after it gets to normal operating temp starts running rough and the rpms start surging, i did a search and it looks like it could be the icm but he swapped that already to no avail. any other suggestions? Thanks in advance, Bill
- 07-05-13 08:32 PM #2
Pull the codes... post with defiitions & current or history.
There is a sticky on how to do it.
Throwing parts at a Caddy is the first wrong thing to do.
- 07-05-13 08:59 PM #3Originally Posted by rodnok01
- 07-05-13 09:10 PM #4
What plugs did he have put in? If not ac delco spec that'd be first thing to fix.
- 07-05-13 09:20 PM #5
Re: 99 sts running rough after warms up
There is a link in the DTC Sticky at the top of the forum that has code definitions.