Teyoloky

Hey everyone,

First off, I just want to say hello! If you missed me in the introductions, I just want to introduce myself. My name is Steven, I am a huge car guy who has always been into GM cars. I just recently within the past week got my first Corvette, a super clean 1985 Bright Red C4. I also work at the National Corvette Museum. I was the bugler on the memorial day video we put on Facebook.

Anyway...

Today I ran into my first little issue with my C4. While I was on lunch break, I was running through the drive through and my car was having a rough time idling and it stalled. It started right back up afterwards, and drove back the museum with no problems, other than the engine idling a little low in the 400s. On my way home after closing the car was back to normal and nothing seemed to be wrong.

Could this be a fuel pump issue that is starting to creep up?

My first car was a Pontiac Sunfire and before it died I remember having to keep a foot on the gas and brake at the same time at stoplights because the fuel pump needed to be replaced. I was a poor high schooler, what else would you expect?

Thanks guys

Teyoloky

Also, info I forgot to mention, the check engine light did come on when it stalled, but once it started again, it went away. Weird. I am used to having to get the engine light reset for just about anything, but hey, I'm new to owning a classic vette.

bjankuski

Sounds like a possible IAC issue, but before you replace any parts check the basics. Fuel pressure, timing, and check for any codes, and then fix or adjust as necessary.

C409

..... One thing that I do regularly is to unplug and reconnect every electrical connector that I can reach ... this cleans the contact points between the pins and keeps current flowing ... this has solved many mysterious issues with the EFI vehicles that I own or work on ... it doesn't take much resistance to dramatically alter a sensors performance ... also regularly clean and tighten grounds , and on the C4 , any time the battery is out of the car clean and tighten all the contacts at the hot junction block behind it .....

hcbph

That's what I'd bet my nickel on as being the likely cause.

Teyoloky

That is probably the issue. I will look into it.

hasnt been an issue since, really. Started up great, idled around 500-600, drove great.

just seems to be when it gets hot outside and I'm moving at a low speed while stopping and going (drive through, stoplight). I'll look into it and update you guys!