Tim
01-25-2013, 01:17 AM
My '89 2.5 Turbo Spirit (5 speed) has a problem I noticed a few months ago. Any time the air temperature was above 45-50 degrees, it ran fine. On cold mornings below 45 or so degrees, it'd sneeze, cough, sputter, and fart erratically until it got warmed up. It seems like a random miss dropping cylinders, if I had to guess, I'd say an ignition miss maybe.
But this past week has had lows in the single digits and high in the teens and low 20's, and it has the problem even after being warmed up and driven several miles. Maybe if I drive it 10 miles and park at a store for 15 minutes and the engine heat soaks it'll be ok, but the cold air is really messing it up. What could be affected by the cold air like this? I do not have a CAI on it, just the stock airbox intake under the hood, not connected to the computer to draw air through it. It draws in underhood air.
Any idea what the problem might be? There are no fault codes showing. I used to have an old 1971 Plymouth Valiant with a modified /6 2 barrel and headers, and it would act like this in cold weather (since there was no intake heat from a stock exhaust manifold), but I put in some aluminum dryer ducting, wired to the front header, to heat the intake air and it was happy like that.
It's a stock 2.5 Turbo engine, stock Garrett turbo, non intercooled. Recent maintenance work in the last 2 months included changing the fuel pump and fuel filter.
But this past week has had lows in the single digits and high in the teens and low 20's, and it has the problem even after being warmed up and driven several miles. Maybe if I drive it 10 miles and park at a store for 15 minutes and the engine heat soaks it'll be ok, but the cold air is really messing it up. What could be affected by the cold air like this? I do not have a CAI on it, just the stock airbox intake under the hood, not connected to the computer to draw air through it. It draws in underhood air.
Any idea what the problem might be? There are no fault codes showing. I used to have an old 1971 Plymouth Valiant with a modified /6 2 barrel and headers, and it would act like this in cold weather (since there was no intake heat from a stock exhaust manifold), but I put in some aluminum dryer ducting, wired to the front header, to heat the intake air and it was happy like that.
It's a stock 2.5 Turbo engine, stock Garrett turbo, non intercooled. Recent maintenance work in the last 2 months included changing the fuel pump and fuel filter.