It runs, has new cap, new rotor, new spark plugs, has a slight miss still but not real bad. The problem is when I put it in gear it has no power, and I have to feather it to get it to move. Can you please give me some ideas of what the problem could be? Thanks!
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Re: 1984 CADILLAC DEVILLE LIMO WITH 4.1
This sounds like you have a vaccum leak. The most common spot to check is the base of the intake. An easy way to find it is to start the car and 'carefully' spray either in this area. you will hear the engine pickup a bit when you hit the spot! Replace the gaskets as necessary. Also check that vacuum hoses are all attached. Frankster016
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Hello! when you say you checked the MAP sensor what do you mean? Did you take voltage readings at idle ? A vacuum leak is the likely culprit, especially to the MAP...The minor shake at idle being the major clue...Send a comment...guru..saailer
I would start by getting spark plugs and spark plug wires. And find out (through part store)what the gap is for your plugs.Then i would replace the cap and rotor and check your air filter. If you have over 60,000 miles i would also change the trans.filter and fluid
Spark plugs Spark plug wires Distributer cap Rotor (if applicable) Air Filter ?
Oxygen sensor only report the condition of the engine the rough running condition can range from a worn sparkplug wires to worn sparkplugs to valve problems to injector problems. with the cadillac deville a tune up should be the first attempt to smooth the rough idle with the inspection of the cap and rotor cap and rotor do have a tendancy to arc internally and create misfire so does sparkplug wire that can leak spark voltage to ground and create misfire. the spark plug wire especially if they are brittle and hard can create issues
The firing order for a 4.1 V-8 is 1-8-4-3-6-5-7-2. Odd number pistons are on the driver's side, front to back and even numbers on the passenger's side front to back. The distributor turns counter-clockwise (backwards) and #1 piston is at 1 o'clock (close to the firewall). Hope this helps.
ENGINE MISSING CAN BE WEAK COIL.BAD PLUGS AND WIRES.REPLACE DISTRIBUTOR CAP AND ROTOR.FUEL FILTER STOPPED UP ALSO FUEL INJECTORS CLOGGED UP CAUSES MISSING.CHECK UNDERNEATH CAR WHILE IDLING.IF YOU LOSING A LOT OF OIL.FRONT CRANKSHAFT SEAL OR REAR MAIN SEAL LEAKING OIL.LEAKING VALVE COVERS.DO A COMPRESSION TEST.AND CHECK CONDITIONS OF SPARK PLUGS.IF PLUGS SOAKED IN OIL.VALVE GUIDES + SEAL LEAKING OIL IN COMBUSTION CHAMBER.