Question about 1998 Jeep Cherokee

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Pcm i was diagnosing why my #5 fuel injector was not responding. i checked it it is good. i replaced spark plugs, wires, distributor and rotor. i ran a compression check. it all checks out good. i took my volt meter and checked all the injector plugs. every one but #5 reads 1 amp in/1 amp out. except #5 it reads 12amps constantly. so i checked the wires all the way back to to the pcm and why i was trying to get another reading i grounded out through the fuel rail. the engine shut down and i cant get it to start again. i ran a diagnostic check with my computer and it read codes p1389, p0700, p1694. can someone please help me get this figured out.

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First is check fuses, if none bad it's a bad pcm

Posted on May 18, 2009


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What shall I do my car running normally but suddenly the engine stop running and never start again.

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RE POST with all this info. to get a better diagnoses

Problem 5 Engine Cranks But won Start

Engine cranks but won start

Feb 05, 2016 | Cars & Trucks

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I have a 2000 Dodge Dakota and has a 3.9. It's giving a p 304 code. Runs really really rough. valves rattle and everything. put seafoam cleaner through it ran it down the road and has stopped. Had the

DTC P0304: Cylinder 4 misfire detected. Probable cause:
1. Check for latest control unit software update
2. Faulty PCM or ECM
3. Fuel injector(s) faulty
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Engine turns but car still wont start up

I'm not sure what your question or need is but I will surmise that you want to know what can cause a "Crank no start". There are several parts or systems that could cause this failure. With these newer electronically controlled vehicles, it is harder to diagnose without a reader or scan-tool. Items to check are: Fuel/gas level in tank, Oil level and age (is the oil change due?), oil sending unit, Fuel (filter, pump, fuse, relay, &related wiring), Distributor (Cap, Rotor, pick-up coil), Spark-plugs, Spark-plug Wires, Defective Fuel injectors, or defective PCM. I hope this helps. If you need more assistents please write back and I'll do my best.

Jan 05, 2014 | Cars & Trucks

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96 bmw 328i p0303 missfire cylinder 3

replace distributor cap and rotor.could have faulty spark plug or wire.could have faulty fuel injector to cylinder 3. or injector wiring has a short.PCM faulty not firing injector number 3.could have mechanical problem like burned out valves intake manifold leak near cylinder 3.

Aug 20, 2013 | Cars & Trucks

2 Answers

P305 code we have changed the spark plugs and wires we have replaced the fuel filter and had diagnostics done on the car and the mechanic says there is nothing wrong with the cyclinders

This is what all should be checked:
P0305 indicates the PCM has detected misfires on cylinder number five.
Here are six common problems that may cause OBD trouble code P0305:
  1. Fouled, cracked, worn or otherwise misfiring spark plug (Replaced)
  2. Bad ignition wire - burnt, cracked, carbon tracked wire or plug boot (Replaced)
  3. Defective ignition components - ignition module, ignition coil, distributor cap, etc..
  4. Vacuum leaks
  5. Clogged or otherwise defective fuel injector
  6. Internal mechanical engine fault, ie., low cylinder compression, bad valve, collapsed lifter, etc..
The aforementioned list covers the most common causes of P0305 in the order we feel is most likely to occur based on our past experiences. Certainly, each situation is different and there are other possible causes for cylinder misfires. Here are other causes we've seen (in no particular order).
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  • loose or corroded fuel injector wiring
There seems to be a few things that have yet to be checked by your mechanic.
I know it is frustrating when the OBDII codes don't point you directly to the problem. To be hones this is something that I can not solve from here. However I hope that with the above information you can get your misfire detected code to go away after the real problem is discovered.


Sep 26, 2011 | 1999 Toyota 4Runner

2 Answers

92 civic engine stalled while driving; fuel pump works; replaced all plugs seeing some oil on old ones. only one plug fires; is coil still working? or the distributor? haven't checked fuel...

Check the ignition distributor cap and clean the electric contact points it might be already dirty.

if one has a spark that means your ignition coil is still okay. Remove the whole cap and check the inside part and clean it, use emery board.
Check also the high tension wires( spark plug wires ).
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1 Answer

I have a 1990 mitsubishi might max it wont run smooth unless you keep your foot on the gas and keep the rpms up a little bit and it wont drive cause it stalls everytime you try to move it. ive replaced the...

You've already eliminated the spark plug & wireset, distributor cap & rotor.
Sounds like your car needs a tune-up, specifically, the PCV (positive crankcase ventilation) valve, and/of the EGR (Exhaust Gas Recirculation) valve.

Components checked/replaced during a tune-up are:
air filter
motor oil
motor oil filter
breather filter
fuel filter(s)
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ECM or distributor cap & rotor
cabin air filter
transmission oil filter
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check all vacuum hoses and lines

Troubleshooting the no-start condition - from the 1990 Mitsu Mighty Max Repair Manual:

Priority Action Part Type -- Cause
1 Inspect Battery -- Battery Discharged or Faulty.
2 Inspect Battery Cable -- Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Distributor Cap -- Distributor Cap Cracked or Burned.
3 Inspect Fuel Filter -- Clogged or Dirty Fuel Filter.
5 Inspect Ignition Coil -- Faulty Ignition Coil.
6 Inspect Wireset -- Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug -- Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter -- Starter Motor Faulty.
9 Inspect Fuel Pump -- Low Fuel Pressure.
10 Inspect Solenoid Switch -- Faulty Starter Solenoid Switch.
11 Inspect Fuel Pump Relay -- Faulty Fuel Pump Relay.
12 Inspect Fuel Injector Pressure Regulator -- Faulty Fuel Injector Pressure Regulator.
13 Inspect Ignition Switch -- Improperly Connected or Faulty Ignition Switch.
14 Inspect Starter Drive -- Faulty Starter Drive.
15 Inspect Fuel Injector -- Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer -- Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer -- Incorrect Operating Information Being Delivered and Sent From The EEC.
18 Inspect Fuel Tank -- Fuel Tank Empty.
19 Inspect Carburetor -- Carburetor Flooded or Faulty Choke.
20 Inspect Distributor -- Worn, Loose, or Incorrectly Installed Distributor.

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2 Answers

No fire mech changed mod on dist what next

Re-check the basics . Does the distributor rotor rotate while cranking?Note: Distributer cap must be removed. Does the vehicle have enough available spark to plugs? Do we have enough fuel pressure 30-35psi min.? With a 12volt test lamp
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remain lit and the other one should blink.
NO ROTOR ROTATION = worn distributor gear,or timing belt failure.
NO SPARK= bad module,coil,no voltage to coil,or faulty PCM

Sep 18, 2010 | 1987 Ford Ranger

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