Join Date: Mar 1999
Location: College Park, MD USA
Seems like cold weather is a trouble magnet...anyway I'd like some advice on a few issues regarding my 86 IROC LG4...
First of all, I've noticed on cold or damp days, until the engine warms up, there's a knocking or tapping noise, usually only hear it if I hold the RPMs around 2000-2500. It's hard to describe the sound, it sounds almost like someone's knocking on the firewall. Oil level/pressure is good...thought it might just be some mechanical part wearing, a rocker or something... any similar experience?
Second, but cause for more concern, I've been having problems with the engine stalling out or failing when I'm driving. Seems to have been happening since the weather turned cold. I'll be driving and suddenly I get no response from the accelerator.
Usually I can drift into a parking lot and the engine comes back to life after a few seconds in Park, but the other night it stalled out completely...I nearly hit someone cuz my power steering failed too. My guess was some kind of gas line freeze or vapor lock, cuz even when it did stall I could start it right back up. I put some Prestone winter fuel treatment in the tank, but it did it to me again today. What do you think? Water in the gas? Fuel pump starting to go? Related to the rapping noise mentioned above? This car is a daily driver, I need to keep it healthy.
Thanks for any info.