Hello all!
My 1989 Oldsmobile Delta 88 is acting strange.
It recently had a low oil and low coolant situation where it overheated and made lots of noise. I replaced the radiatior and fixed a few leaks, solving both fluid loss issues.
The new issue is intermittent.
Sometimes, the car drives nice and smooth, makes full power and idles like new. Other times, the engine hesitates, cuts out briefly and runs rough. I have engine code "48," which is a misfire code. I replaced the ignition control module (warranty part), but this did not solve the issue. The issue seems to go away at higher rpms or it is just more noticeble at lower rpms.
My friend assumed it was a bad coil, so he pulled the wires off the coil packs one-by-one (with car off), looking for one that did not fire. All of the packs fired. I am not going to rule out that the car has no coil problem at this point and I intend to check them with a multimeter tonight.
The wires and spark plugs are relatively new.
One of my battery terminals is also "kinda" loose. The bolt or the threaded hole is partially stripped on the ground terminal. This could be the issue but it has stayed in place for 500 miles now. I am thinking about finding a piece of soft metal to fit into the hole to improve contact.
Any ideas?
-Al