1984 Ford Tempo stalling out when it shifts to 2nd gear

Tiny
NORMAJEAN
  • MEMBER
  • 1984 FORD TEMPO
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 49,000 MILES
My 1984 ford tempo starts off ok, but when it starts to shift into 2nd gear it stalls out, misses out and backfires through the carberator.

What is causing this and how do I repair it?

Norma
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Tuesday, February 17th, 2009 AT 8:32 AM

7 Replies

Tiny
FIXITMR
  • MEMBER
So putting it into gear does not make it want to stall?Can you drive immediately after starting?Is the problem consistant from the get go?How many miles per hour does it go before the second gear shift?Have you tried manually holding in first longer then shifting?Have you tried manually starting out in second?When did this problem start?Had anything recently been done to car?The symptoms you describe sound like to lean a mixture or the spark is too weak/misfiring?Fuel pressure could be down?Do you know how many miles are on car?Is it a unknown high mileage beater?The odometer only goes to 99999 then turns over. You should check MAP sensor hose. It goes from map sensor (on top of passenger side shock tower) to intake manifold on engine, it's not very big or long but if it has a leak it will definitely mess with you fuel mixture. The reason it fails is because it is subjected to jerking around by engine. If that's not it then pull coil wire off an look inside both ends for heavy corrosion (rusty or white powder) and clean or replace. When was the last tune-up?
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Tuesday, February 17th, 2009 AT 7:20 PM
Tiny
NORMAJEAN
  • MEMBER
The car starts off fine, but when you get to going about 20-25 mph and the car starts to shift out of low(automatic teamns.) It stalls out, sputters and carries on.

The car only has about 49,000 miles on it, but was driven by an older lady and not very often.

The coil has been checked. The distributor is rusty on the inside?

Thanks for you reply. We are stumped.
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Wednesday, February 18th, 2009 AT 10:14 AM
Tiny
FIXITMR
  • MEMBER
There are so many if's here unless you can communicate more effectively I cannot keep guessing?You can check the inside of the distributor by taking off rubber boot/sock that covers it top(if applicable)and loose the 2 screws at the base of the cap. Lift off and look around inside. How long have you owned/driven car and when did problem start?What happens if you start out in second (2)instead of first(D)?
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Wednesday, February 18th, 2009 AT 9:10 PM
Tiny
NORMAJEAN
  • MEMBER
Thank you for your patience.

This car acts like it isn't getting enough gas.

I start out in drive, get the car going about 20-25 and as it shifts into 2nd gear it stalls out. If I put it in low gear it does alittle better.

The plug wires, distributor cap, and a seal underneath the carberator were replaced yesterday. Now the car runs even worse.

I just found out that the gas tank has been damaged pretty bad, by someone backing over a stump. It doesn't leak, but would that have anything to do with the problem.

My mechanic I have had for years can't even figure this out. Also another mechanic that works for him.

Any suggestions are helpful. Thank you.
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Saturday, February 21st, 2009 AT 2:00 PM
Tiny
FIXITMR
  • MEMBER
1984!That's an old 1!It has the single throttle body(looks like carburetor). The nice thing about these is the water pump is much easier to change. What are your weather conditions where you are at and when did the problem start?Was it gradual or sudden in developing?Like I said before, it does sound like a fuel problem causing a lean mixture that shows up more under a greater load like a gear change/speed increase. This could be a fuel pressure problem or a fuel control problem. Has a fuel pressure test been done?On this car you can watch the throttle body spray it's fuel with the cover removed. It sprays in a cone shape like a shower head. This is all computer controlled. The MAP sensor being the most influential in this case. Also the TPS and temp sensor and the computer itself. Age really works against this car unless these parts have been replaced before. It would be nice if your mechanic could list the fuel system parts he has verified as working correctly?
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Sunday, February 22nd, 2009 AT 1:23 AM
Tiny
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Thanks you for your response.

This car must be different, because it doesn't have the throttle body. It has a 1 barrel carberator.
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Sunday, February 22nd, 2009 AT 8:41 AM
Tiny
FIXITMR
  • MEMBER
WOW!Never met a carbureted tempo!And a 1 barrel at that!Would like to get my hands on 1 of those carbs!Probably means you have no computer in your car?Well, this changes things as far as diagnosis goes!You have a mechanical fuel pump in front below valve cover on right side of motor so tank damage is moot. Except possibly low gas level starvation?Like I said, you havn't told me if the car has ever ran right for you?And the carburetor is a little complex in operation from older styles. It's called a feedback design. The reason they replaced the gasket is to fix a possible air leak which would explain the lean sputtering/backfiring. If an airleak(from other sources) is ruled out then all that's left is not enough fuel(fast enough) or internal carb defects. Given the age if carb is original I suspect that as the cause of the problem. Rubber parts rot with age. Very common problem on older low mileage cars. All over the car, not just in carb. Since carb is exposed to fuel, makes it worse for carb parts. Usually feedback carbs when parts fail default to rich or lean. Sounds like yours is lean if failed.I wonder if a repair kit is available for that carb?I also have had carb cars act in a similar way and it was the fuel pump internal valves failing. Ok I just looked online and their may be 2 diff carbs used on that car. Holley or carter. And if holley there are 2 models. Kits are available for $30+and found holley rebuild for $100. Also I noticed it has an electric choke. You could tie/rig choke in half closed/open position and see if problem improves as that will cause a richer constant mixture. You could drive it like that but it would probably use more gas!
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Sunday, February 22nd, 2009 AT 4:04 PM

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