Cadillac Catera and Cimarron Forum Discussion, Help for a friend and his 1999 Catera in Past Cadillac Vehicle Discussion; You right as long as the job is done right.. The two guys I have talked have done jobs for ...
The new fuel pump and filter is on the car. We pulled up two codes (P1141: Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction & P0727: Engine Speed Signal Circuit Malfunction) But that is not the reason why the car is not starting, from what the guy told us the timing is off and he is sending someone out to rest the timing for us. more to come after we rest the timing.
The timing is off??? There is no distributor, timing is controlled by the PCM, and not adjustable. Did the "mobile mechanic" tell you this?
P0727 - Engine speed sensor? Anyone know if that refers to the CKP or CMP?
In many cars, the tach and ignition control rely on the CMP sensor. If the PCM has no reference of engine speed/position, it cannot provide spark. This can cause hard/no starting, and stalling.
..........As asked before... Is there spark?
Also, with no reference of engine speed, the fuel pump will only run briefly at key on, but not while cranking. You never answered my question about fuel pressure, so I'll assume nobody bothered checking it, but did anyone even check if the old pump ran at all before replacing it? Does the new one run?? At key on? While cranking?
I asked for codes over and over again. I hope for your sake that I'm wrong about what "engine speed sensor" is referring to, because if I'm right, that may have been the problem all along, and the codes would have told us in the beginning.
Ok, I found some information on the code on a Saturn forum (similar drivetrain to the Catera).
The code is triggered when the TCM does not receive an engine speed signal from the ECM. That means either a communications issue between the ECM and TCM, or a problem with the CKP sensor, its wiring, or even a faulty ECM.
So... If it were a communications problem between the two modules, the engine would start and drive, but not shift right. A CKP/CKPs
wiring/ECM issue would cause no spark, and no fuel pump operation while cranking.
Check a couple of simple things, you don't need the mechanic:
- Remove the gas cap, and put your ear to the hole. Have a helper turn the key to ON. Do you hear the fuel pump run for a couple of seconds?
- Now have your helper try to start the car. Do you hear the pump running?
-Go to the parts store, and get a spark tester (~$5). Unplug a plug wire from a plug, plug on the tester, clamp it to something metal, have a helper try to start the car. Is there spark?
If there's no spark, and/or the fuel pump doesn't run, replace the DuraCRAP CKP with an AC/Delco one.
He did all that, he unplug everything first then cleaned everything... I sat and watch him do everything, he used his truck to try and rest everything took 15mins and that still didn't do anything. Went back and checked everything so the EMC is an issue for now....