Engine still has no spark will not start just keeps turning over i am getting an error code of e52 please help
According to this site:
have code E52 PCM Memory Reset how do do this
99% of the time e52 is just telling you the battery was disconnected in the last X number of starts. It will probably go away after a day or two of ignition cycles. If the battery has been pulled then any other trouble codes would have been cleared and will not come back until they are re-detected, May have to drive it a bit to get any new codes to appear to help trace your problems.
SOURCE: Stalling Issues
Was the TPS adjusted to 1.5 volts or checked for that voltage reading beforehand?
SOURCE: 91 deville 4.9 fwd shudders under light acceleration
check the egr valve it mat be stuck closed ..... code PO404
SOURCE: 1991 cadillac deville fwd 4.9 engine shudders hard
I have a 1991 Cadillac Fleetwood 4.9 120000 miles, I have the same problem. replaced plugs,wires,cleaned throttle body, and O2 sensor and have same problem. Taking it to a GM shop on 02/24/10.
SOURCE: PO307 check engine code. i have changed spark
Causes: A code P0307 may mean that one or more of the following has happened:
* Faulty spark plug or wire
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector
* Burned exhaust valve
* Faulty catalytic converter(s)
* Running out of fuel
* Poor compression
* Defective computer
Possible Solutions: If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Hope this helps (remember to rate this answer).
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