89 Caddy Brougham 307 stalls while driving
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 89 Caddy Brougham 307 stalls while driving in Past Cadillac Vehicle Discussion; Good Day All, Just got my Temp Plates for my caddy, took it for a drive and after 10 minuites ...
  1. #1
    JLanzino's Avatar
    JLanzino is offline Cadillac Owners Member
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    89 Caddy Brougham 307 stalls while driving

    Good Day All,

    Just got my Temp Plates for my caddy, took it for a drive and after 10 minuites it was warm around 60 KM the car felt boggish and stalled, wouldn't start back up, tapped the fuel pump started right up went down the road same thing again, got it towed home.

    After it cooled down at home it fired right back up no problem

    do I have a bad pump or filter?

    I have a saftey & etest booked tomorrow but i dont think ill be going

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    SafariOne is offline Cadillac Owners Fanatic
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    Re: 89 Caddy Brougham 307 stalls while driving

    These symptoms could also arise from weak distributor components. Check to see if the spark is weak or strong then you can go from there.

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    cadillac_al is offline Cadillac Owners Connoisseur
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    Re: 89 Caddy Brougham 307 stalls while driving

    Make sure the choke is opening. If you are just getting it on the road it should have a fresh fuel and air filter and new spark plugs. If the distributor looks grungy then that should have a new cap and rotor too. Start with the simple stuff first.

  5. #4
    JLanzino's Avatar
    JLanzino is offline Cadillac Owners Member
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    Re: 89 Caddy Brougham 307 stalls while driving

    Hey guys I was trying to recreate the stalling problem at home & did, I noticed when Im 3/4 of the way down on the gas pedal it stays at that RPM then starts surging, from High to low several times tries to stall twice & stalls the 3rd time. What would cause it to surge?

  6. #5
    jamespowers is offline Cadillac Owners Enthusiast
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    Re: 89 Caddy Brougham 307 stalls while driving

    Quote Originally Posted by JLanzino View Post
    Hey guys I was trying to recreate the stalling problem at home & did, I noticed when Im 3/4 of the way down on the gas pedal it stays at that RPM then starts surging, from High to low several times tries to stall twice & stalls the 3rd time. What would cause it to surge?
    I hope I am wrong but I have experienced it before due to the Throttle position sensor being bad in the Carburetor. Have you checked the engine codes by jumping the terminals on the ALDL. That will usually give you an idea of what is wrong if the car computer recognizes it. It will recognize the TPS if that is the problem.

  7. #6
    JLanzino's Avatar
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    Re: 89 Caddy Brougham 307 stalls while driving

    Just Checked my codes comes back with 15, 21 & 44

    15: coolant temp/low temp

    21: TPS circuit

    44: O2 sensor (lean exhaust)

    Could anyone go into detail on these 3 codes for me so I can understand it better Please

  8. #7
    csbuckn is offline Cadillac Owners Connoisseur
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    Usually, you wanna go in order when chasing codes so the coolant temp sensor may be bad causing you to run lean, the TPS sensor is probably having a hard time keeping up with the lean mixture so its causing a code, the O2 sensor is picking up the two bad sensors and confirming the malfunction...in theory. I'd start with the temp sensor problem and go from there.

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    JLanzino's Avatar
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    Re: 89 Caddy Brougham 307 stalls while driving

    Ill start checking the sensors & wiring

    Could the TPS Circuit & Lean exhaust be causing my stalling problems?

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    csbuckn is offline Cadillac Owners Connoisseur
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    Yep, a sensor is picking up a problem or it is the problem causing the motor to starve of fuel...in theory. Dont forget to check the fuses first. TPS could be the problem but my money is on the coolant sensor.

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    JLanzino's Avatar
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    Re: 89 Caddy Brougham 307 stalls while driving

    Guys

    you are life savers, I will start checking these sensors in the morning, would anyone here know where the Coolant sensor & TPS Sensor are located?

  12. #11
    outsider is offline Cadillac Owners Connoisseur
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    Re: 89 Caddy Brougham 307 stalls while driving

    TPS is inside the carb. It's on the left hand (driver's) side right up front. You'll see a whiteish plug for it right under the accelerator pump.

    You can test this by back-probing the plug and checking voltage with a multimeter. This can also be adjusted, though you need a special tool for it. I have the tool, I can take a picture of it for you if you need to make adjustments. or try to find you a link to where to buy it.

    But as CSBuckin' said, i'd start with the coolant temp sensor. Not 100% sure where that is located on the 307, never had an issue with mine.

  13. #12
    JLanzino's Avatar
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    Re: 89 Caddy Brougham 307 stalls while driving

    if you can send me a picture of that TPS tool it would be much appreciated

  14. #13
    JLanzino's Avatar
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    Re: 89 Caddy Brougham 307 stalls while driving

    Quote Originally Posted by outsider View Post
    TPS is inside the carb. It's on the left hand (driver's) side right up front. You'll see a whiteish plug for it right under the accelerator pump.

    You can test this by back-probing the plug and checking voltage with a multimeter. This can also be adjusted, though you need a special tool for it. I have the tool, I can take a picture of it for you if you need to make adjustments. or try to find you a link to where to buy it.

    But as CSBuckin' said, i'd start with the coolant temp sensor. Not 100% sure where that is located on the 307, never had an issue with mine.
    what do you mean by back-probing?? and what voltage should there be to see if its ok?

  15. #14
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    paetional0 is offline Cadillac Owners Member
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    Lol back probing.... Sorry
    talismandave likes this.

  16. #15
    JLanzino's Avatar
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    Re: 89 Caddy Brougham 307 stalls while driving

    Sorry for the long post back lol, been busy with HVAC School

    Ok, We did a complete tune up, New Plugs, Wire, Rotor, Cap, Coil, Air filter and Fuel filter with a nice oil change aswell, went to start the car its running worse than before sounds like its missing.

    Why is it running worse now?

    It still stalls do I need to rebuild the carb?

    I was thinking of dropping a EFI 350 in her and gut the electronics for a better and simpler Car lol

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