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No fire changed pickup and pcm - Ram 1500 Dodge Cars & Trucks

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It would help to know what the year and engine is, but I'm gonna throw this out there anyway. Watch your tach, if you have one, while cranking the engine. If it stays dead on zero, the most likely cause is the crankshaft position sensor. It's located on the bell housing behind the passenger side cylinder head. You can use either a regular socket or a hex key socket to get it off. I don't remember what sizes though and it's such a ***** to get to you'll swear I'm lying. I've replaced a handful of them myself for the same thing. This applies 94 (I think) and up 3.9, 5.2 and 5.9 gas engines)

Posted on Apr 13, 2009

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I have a 2003 s10 blazer 4.3v6 vortec. ok i keep getting hydrolock my #6 keeps feeling up with gas. i changed the sensors bought one new injector and new regulator and still the same.New pcm?


# 6 injector ground side is shorted to ground causing injector to fire constantly . It's probably not the PCM , If injector driver inside the PCM was bad the injector wouldn't fire at all . On the injector there are two wires , one is B+ voltage , the other goes to the PCM . PCM supply's a ground when triggered . How to test fuel injector circuit with basic tools open control wire

Jan 26, 2017 | 2003 Chevrolet Blazer

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Car starts and runs but in reverse starts shaking SES lights up and blinks. Have changed the plugs but are getting a P0340. It's an 1998 Saturn 112,000 miles. What could it be?


DTC P0340 will set if the PCM voltage on cylinder #4 signal wire is not pulled to ground (cam signal pulse) when:
Diagnostic Aids
Important: A cam pulse missing may not affect engine operation.
?€¢
An open or high resistance on the #1 plug wire or plug will result in DTC P0340 setting.


?€¢
Inspect the EIS towers and plug the wire connections for corrosion or other signs of poor retention at connections.


The electronic ignition (EI) module supplies a signal to the PCM whenever it determines that the #4 cylinder fired on its compression stroke. Because of opposite coil tower polarity, the simultaneous fir of #1 and #4 cylinders are of opposite polarity as well. Under most conditions, except decel, the waste spark cylinder fires before the compression cylinder in sequence. The EI module can determine this polarity sequence and voltage amplitude by using capacitive pickup plates located under the 1/4 coil. If the module senses a positive to negative sequence and high negative spike when #4 is on TDC, it pulls the PCM cam signal to ground signaling that #4 has just fired on compression. This signal along with the double pulse received from the CKP sensor, synchronizes spark and fuel timing.
Beside plugs , plug wires need to be replaced as well !

Aug 26, 2016 | Saturn Cars & Trucks

1 Answer

2004 ford escape cylinder 6 miss fire change plugs. wires ,coil, injector,its get no signal to coil for fireing


I suspect the PCM has a bad driver from the misfire. Need a PCM. Get numbers off PCM and find on ebay cheap.

Just one cyl misfire DTC code?

Jun 29, 2011 | 2004 Ford Escape

1 Answer

Range rover vouge back fireing on lpg and petrol with power loss


check fuel pressure. backfire tends to indicate a LEAN (not enough) fuel condition. This in turn can be caused by: a large air/vacuum leak, a restricted fuel supply, a clogged fuel pickup screen, a weak or leaking pressure regulator, O2 sensor(s) failures causing a "commanded rich" output to PCM - PCM then delivers a lean signal, a faulty mass airflow signal, a defective air temp sensor, a bad coolant temp sensor, crappy secondary ignition components.

Feb 14, 2010 | 1996 Land Rover Range Rover

1 Answer

No spark to coil on 1989 jeep cherokee pioneer


No power to the coil? It could be a PCM, wiring, crank sensor....no fire out of the coil, most likely a bad coil, bad pickup in the distributor.

Aug 13, 2009 | 1989 Jeep Cherokee

1 Answer

1994 dodge ram 1500 5.2L


Code 11 "" No crank reference signal to the PCM. or bad Crank sensor. If no crank signal no spark and signal to the injectors.
Replace as soon as possible.

Jul 03, 2008 | Dodge Ram 1500 Cars & Trucks

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