Where is the fuse for the ECM on a 1997 Chevy Venture
I am having trouble with my van. First we replaced the 3 front spark plugs, cables and ffresh new motor oil & filter, and after taking a 4 hour drive. My van is shaking and I feel it more when I am releasing the break. Because we didn't have the proper tools the other 3 spark plugs and cables weren't changed, those I believe are under the motor and takes time to take that apart. I've seen 2 mechanics and these are their conclusions,
One of them hooked my car up to his machine (it was a hand held small box that displayed code numbers and a had booklet) he plugged it in somewhere under the steering wheel, the machine didn't even turn on, he then tried it on his car to be sure it wasn't the machine but It worked on his. Therefore, he said I may be having trouble with the computerin my vehicle (told me to first check to see if a fuse from the ECM needed to be replaced) Can't find that??
Second mechanic said that this is happening because of the other 3 spark plugs and cables that need to be changed and possibly a valve in the motor is clogged.
I don't know what to do ....someome plz shed some light??
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Make sure battery has a full charge. Usually, with engine cranking, I want to visually check for spark at the plugs, use a gage and check proper fuel pressure, also, check fuel injector pulse. If I'm missing all three, I want to check for rpm signal. That signal comes from crank sensor. Don't replace anything unless your testing points in that direction. Can you check for applicable trouble codes? When testing only crank the starter motor for a few seconds at a time, let it cool off a little.
If only one component has a problem, then we will check voltage and ground for that component. If you want a fuel pump wiring diagram, I will post it.
You replace parts as part of your preventative maintenance program,not to solve a problem When working on a problem only component testing will find the issues You need to check for fuel pressure at the motor with a gauge You check spark with a test plug you buy,not ground a plug or wire on the vehicle You can check for compression or cylinder leak down to test some mechanical issues I would assume ALL Fuse & links have been checked,as well as battery voltage 12.6 v or more & cables etc The ignition switch could be bad,turns starter but not all the internal contacts are good
code p0131 refers to heated oxygen sensor (HO2S) bank 1 low voltage. possible causes ---Exhaust leak wiring short to ground HO2S ans ecm I would check the wires are not touching the exhaust then replace the sensor with a genuine one as the settings may be different on an after market one giving a false code .Code p0300 refers to random / multiple cylinder/s --- misfire detected. Possible causes include Spark plug/s--- HT leads---injectors--- ignition coils----low compression and wiring
Pull out the 2 long bolts that hold your motor mounts together, and then carefully jack the rear of your motor up from the bottom by the oil pan. You should now have enough room to wiggle your ratchet back there.
those are a pain to do, there should be either 1 or 2 wishbones going from the top of the engine to the radiator support at the front, remove them and put a ratchet strap from the alternator bracket to the radiator support and crank the engine forward. Be sure to do it on a cold engine as you will be working right next to the manifold. The center cylinder isn't too bad but the other 2 are more by feel than sight. be sure to use anti sieze on the plug threads and be very careful not to crossthread the new plugs.
check to make sure the security light is not on if it is the van will have spark but no injecter pulse the best way to solve this issue is to have the original igniton key and put it in the igniton in the run position and leave it on for 10 minutes then the light will flash then try to start the van