1990 Brougham 307 V8
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5.0 and 5.7 Discussion, 1990 Brougham 307 V8 in Cadillac Engine Technical Discussion; Hello, everybody! It' been a while since I've been on. Well, here's the update. After 6 months, I have somebody ...
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    MadCaddie69's Avatar
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    1990 Brougham 307 V8

    Hello, everybody! It' been a while since I've been on. Well, here's the update. After 6 months, I have somebody through a friend that is working on my car. He picked it up last Saturday. H's gonna check the 307 to find out why it won't start. I hope he does. It might be a fuel pump, bad ignition coil, timing, etc. If it all works out, I'll have my baby back. Can't wait!!

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    MadCaddie69's Avatar
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    Re: 1990 Brougham 307 V8

    Update: It was the timing chain! All this time AND money! What the flip?!!

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    N0DIH's Avatar
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    Re: 1990 Brougham 307 V8

    Chain or cam gear? Not that those ever would fail.....

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    Re: 1990 Brougham 307 V8

    From what the guy said, pretty much the whole thing. He says it was pretty worn. It happens. BTW, how have you been, dude?

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    Re: 1990 Brougham 307 V8

    I am doing good, been out of town some, busy with work (got a new computer system that is giving us fits) and just not having as much time as I want to for "play"....

    I pulled the original timing set of out of my 307 @ 150K and it looked like new. I guess my dad's driving and 2.14's does wonders for that. I honestly think the roller cam engines helped make them live a lot longer, that is one weak spot in Olds, the cam is forced into the block with the lifter taper and once the cam wears, the cam walks around and will wipe the distrib gear and the timing set will get beat on and the fiberglass one will start chipping teeth.

    The 85-up 307's and diesel 350's don't have the issue when they went to rollers....

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    Re: 1990 Brougham 307 V8

    hey wats up i just got into this n i have some wat of the same problem my 93 fleetwood was running good until recent ly but now it will only stay on for a few minuets and then turn off and sometimes has problems tarting do u think it might be the same problem i have done this to it changed spark plugs and sparkplug wires, changed distributor cap and coil checked the timing to make sure the fireing order was correct but still nothing im starting to think that its getting worse as time goes on ..HELP me out here im fresh outta ideas

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    Re: 1990 Brougham 307 V8

    Quote Originally Posted by theme106 View Post
    hey wats up i just got into this n i have some wat of the same problem my 93 fleetwood was running good until recent ly but now it will only stay on for a few minuets and then turn off and sometimes has problems tarting do u think it might be the same problem i have done this to it changed spark plugs and sparkplug wires, changed distributor cap and coil checked the timing to make sure the fireing order was correct but still nothing im starting to think that its getting worse as time goes on ..HELP me out here im fresh outta ideas
    Hmmmm......... I think your fuel line may need to be cleaned out. MY mom's DTS does that sometimes too. Buy a can of Seafoam engine treatment. Remove the vacuum line. Pour half of the Seafoam treatment in a cup. Start your engine. Let the vacuum line suck the Seafoam from the cup. Then pour the rest of it in your oil reserve. Turn your car off for 5 minutes. Then start it up and rev it to 3000 rpm. Keep it that way for about 5 to 10 minutes. The dirt comes out of the exhaust. Then Voila!! You're good. Try that first and see what happens..

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    Re: 1990 Brougham 307 V8

    So the timing chain was replaced, but the car still won't start. This is ridiculous! All this time, I've been waiting for the day that my pride and joy would be resurrected but I'm not getting nothing. Some say the carburetor might be cooked. When I turned the ignition, gas would spit out of it as an escape. However, I had it completely rebuilt. So that can't be the case. Anybody have a clue to what might need to be done?

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    Re: 1990 Brougham 307 V8

    try wat happend with mine might be the fule pump that might be the reason for the gas but im just guessing at this point any help is good help i guess

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    cadillac_al is offline Cadillac Owners Connoisseur
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    Re: 1990 Brougham 307 V8

    Gas shooting out of carb? Sounds like the distributer could be off a tooth or 180 off. So your mechanic gave the car back to you not running?

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    Re: 1990 Brougham 307 V8

    Quote Originally Posted by theme106 View Post
    try wat happend with mine might be the fule pump that might be the reason for the gas but im just guessing at this point any help is good help i guess
    I'll have him check the fuel pump. The timing chain was definitely wornout! The car hasn't been running for a year.

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    Re: 1990 Brougham 307 V8

    Quote Originally Posted by cadillac_al View Post
    Gas shooting out of carb? Sounds like the distributer could be off a tooth or 180 off. So your mechanic gave the car back to you not running?
    No, he's still got the car. He said he'll fiddle with the distributor to make sure it's in correctly. We'll see what happen. I miss my car so bad. I have absolutely no desire of gettin rid of it!

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    Re: 1990 Brougham 307 V8

    If dizzy was dropped in backwards, swap all the plug wires across from each other.

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    Re: 1990 Brougham 307 V8

    Quote Originally Posted by N0DIH View Post
    If dizzy was dropped in backwards, swap all the plug wires across from each other.
    Some dude told me that he had the same problem with a Caprice. He changed his timing chain and the car still wouldn't start. Come to find out, his ECM fuse was blown. He said he changed it and it started right up! Do you think I can try that?

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    Re: 1990 Brougham 307 V8

    If blown, the carb'd 307 won't stop running, it will run pig rich, but won't stop running. If the HEI fuse, yes, it will stop running. But ECM fuse it will go rich and fixed to base timing (10 degrees or so)

    Oh, and IIRC on the 307, the dizzy turns the opposite way as a Chevy, so make sure the wires are going around the same.

    http://www.oldsmobility.com/tuneup.htm

    The rotor turns CCW, and the wires should be 1-8-4-3-6-5-7-2 going also CCW. Chevy it is CW and the rotor turns CW.

    This is from the side of the cam the dist gear sits.

    Easy way to check. Pull #1 plug, pull cap off. Stick finger in the plug hole lightly, have someone bump over engine till you feel compression, note where rotor is pointing, that is where #1 is.

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