Questions About a 2.5L 4Tech Grand Am
First, I know this isnt a Bonneville question per se, but I have posted these questions in a Grand Am forum yesterday, and I am still waiting a reply. I thought I would post it here, to see if anyone here can help with this Pontiac.
First, this car has been in the family for about 2 years, and has basically sat that whole time. I would run it every so often, just to make sure things don't freeze up. It has the 2.5L 4tech motor (the so-called Iron Duke). It'* a '89 Grand Am LE, with only 96,000 on the clock.
Here are my main concerns:
- Low oil pressure. I took the car out of storage yesterday, and immediately had the oil & filter changed, since the oil was dark, and it was so old. The level was fine, and the pressure (by the gauge) was mid range until the car was really warmed up, then it dropped. I put 10W30 oil in it (GM recommended) and now the pressure is barely above the red zone, and rises only when it acclerates to 2500+ rpm. If I put thicker oil, say 20W50, will this help? Could this be a sensor, or more likely the oil pump?
- The radio will only display the time, and will do nothing else. Is there a separate fuse for the radio functions? My fusebox is not labeled, and I dont have the owners manual. Where can I find out which fuses are which, and if there is more than one fuse panel?
- My speedo is crazy! It will register the correct speed about half the time. The other times, it'* at 0, or will bounce up to the top of the scale, and back down, and back up repeatedly. Is there a sending unit that controls this (and where)? Or. am I looking at something else?
I am trying to fix this car for daily use, either to give to my son, or to sell it. Any help from the Bonneville folks would be appreciated. Thanks for your patience.
1993 Bonneville SE, Purple Pearl...The Deuce
Born On Date: 1/25/93 @14:18
187,000+ miles # Parts Fallen Off=(3) # UIM'* Replaced=(1)
# Transmission Mounts Replaced=(3) as of 11/7/06.