Mechanics

UNEVEN IDLE AND SLUGGISH ACCELERATION

Ford Tempo

1987 Tempo GL with 2.3 4-cyl and auto trans. Odometer shows 78K, but who knows?

I have the two issues above. Both are intermittent. Sometimes the car runs just fine. Then with no warning it will lose power while driving along. Pressing on the gas just gives the sound of an open throttle with no acceleration. Usually, backing off will return it to normal, but at an idle. The worst was the other day when I had to run at just above idle and slowly get up to traffic speed. Even running at 45 mph, I could not add throttle and get any acceleration. Usually, though, I can throw it in neutral, hit the pedal until it starts to rev up, fairly shortly get back to normal operation, and run just fine for a while, up and down the gears and speed without a hitch. It might go a few days with no problem, then back to the acting up. It starts easily.

The idle often drops off. It will run normally for about 10 seconds, then drop off for a bit and regain normal idle speed, again for about ten seconds and dropping off again.

I have noticed that in gear and with the brakes on, the idle evens out.

I should say the engine has been out of the car twice, once to change the flywheel and once to swap transmissions. I have changed a lot of parts in the process, over three years or so. This includes the fuel pump, the injector, the usual tune-up parts. I have tracked down all the vacuum leaks I can find.

I had Autozone check the trouble codes. First time showed DC Motor not turning, and EEC failing. Second check, after I fixed a vacuum leak, showed no codes. The car ran fine for ten miles or so, then started acting up again. Not so bad as before, but it is not fixed and I don't want to end up on the side of the road somewhere.

Any ideas?
Avatar
Johnuw93
February 11, 2007.




I know you replaced the fuel pump, but it sounds like it may be losing pressure. If you can run a gauge up to the windshield so you can monitor the pressure when it acts up, it will verify or eliminate that.

Try the fuel pressure: read it at idle and 2500rpm

Recheck the ISC and TPS-Got codes

Mr. Paul Congrats on your recent promotion from Tech18 to C2MT. I must be blind didn't catch this one.

Take a wild guess on the pic-Give up
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Tiny
Rasmataz
Feb 12, 2007.
Thanks Ras,

No idea, Alaska?
Montana?

Thanks. I will give that a try. BTW, could it be contamination in the tank?

The picture shows Anchorage, AK, I do believe.

Tiny
Johnuw93
Feb 12, 2007.
Dirty dog you track the url didn't you -its Anchorage. My home away from paradise. Talk about hunting go to the Last Frontier-The land of the midnite sun.

Here women don't wear tops-tired looking at them Hmm. You like that don't you. In a yr I'll be moving back-just waiting for my 3 boys to get out of Iraq.

Tiny
Rasmataz
Feb 12, 2007.
Be honest never did like the Fords 80's T-models- Taurus/Topaz/Tempo something ain't right about them

When you do the fuel pressure you'll catch what the pump, regulator/check valve/in-tank screen are doing. Might be contamination.

Attempt to check the O2 sensor and pressure test the exhaust system.

Even you, your right On w/the Pic.

Tiny
Rasmataz
Feb 12, 2007.
I grew up in Fairbanks. Lots of trips to Anchorage, and lived there when I was 13 for a year. Chugach Range in the background and low skyline in the foreground is familiar.

Can't argue about the T cars. Keeping this thing on the road has become somewhat of an obsession. If you like constant challenges, can't beat it. I've gone from a few screwdrivers and a socket set to everything needed to R& R the transaxle.

Tiny
Johnuw93
Feb 12, 2007.
Hooray! Alaska damn you know your flags.

1st time I dealt with Taurus, belongs to a friend that lives in Houston, there back in 85 they make a lot of weird noises, sometimes makes troubeshooting difficult.

Have you change the fuel filter and also check the pressure regulator with and w/o vacuum-also for leakage in it. You see gas -shit can it.

Tiny
Rasmataz
Feb 12, 2007.

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