iron duke 2.5L Camaro engine

You’ve got questions, we’ve got answers. We work with the Summit Racing tech department to help you tackle your auto-related conundrums. In this week’s Mailbag, we’re troubleshooting problems with a fuel-injected 2.5-liter Iron Duke Camaro engine that’s experiencing fuel starvation in cooler temperatures.

Q: I have a 1982 Camaro with a 2.5L four-cylinder with throttle body fuel injection. It runs great in the summer, but if it gets below 55 degrees F outside, the car won’t start.

I have replaced the distributor, throttle body, computer, and all of the wiring, and the car still won’t start.

The gas gets to the throttle body, but won’t come out of the fuel injectors. I’ve had the car for five years now and if I park it where the wind won’t hit the front end, it starts.

The car came from North Carolina where it was warm, and it ran fine.

Do you have any idea what could be wrong?

A: The coolant temperature sensor and air temperature sensor supply voltage signals that are monitored by the computer.

The resistance of the wire changes as a function of temperature. Low temperatures result in less resistance. As temperature increases, so does the resistance.

A failed connection—or even just a bad one—can be the reason the computer won’t allow proper fuel delivery to start the engine.

We recommend checking these out, and repairing or replacing the connectors or wires as necessary. That should solve your problem.