Author Topic: misfires galore and engine dies  (Read 1596 times)

kevinmetal

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misfires galore and engine dies
« on: September 30, 2014, 11:59:58 PM »
looking for some help on diagnosing whats wrong with my car

last week heading to work driving at about 40mph check engine light started turning on and right away the engine started misfiring
tried giving it some more throttle thinking hopefully it was just a hiccup but during acceleration it kept misfiring
this went on for about for about a mile before the engine died on me before the next light, pulled off to the side while i still had speed and tried starting it up again
fired right up after waiting about a minute and idled fine for about 5 minutes before it wanted the rpms started to drop and it wanted to die on me again
it only stayed running if i kept giving it some throttle, but some how it managed to limp it to work where its been sitting

i was able to pull the codes

4 coolant temp sensor signal
6 rpm signal
7 tps signal

twincharger

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Re: misfires galore and engine dies
« Reply #1 on: October 01, 2014, 12:31:27 AM »
What does the tachometer do?

If the tachometer is steady then it could be a fuel pump issue.

If the tachometer is bouncing, it's electrical.

Could be a pickup coil in the distributor going out, or the wiring to it.

Could be a bad coil/igniter, or even distributor cap/rotor or plug wires.

It could be a bad ground on the computer, or a ground on the engine.

The combination of codes you have don't make sense...

The coolant temp sensor and TPS signal use the same 5 volt power wire, Vc, but so does the AFM and there is no AFM error, so it is not a sensor power issue.

The RPM error probably means that the computer is intermittently missing a signal from one of the pickup coils... It needs signals from both to run.

TPS error won't cause misfiring or check engine light.

Disconnect your battery for a minute to reset the codes and see what comes back,

Your problem will either be in the distributor or the coil/igniter.  Can't tell which one yet.

I found this on club4ag.



Diagnostic Codes
The following table lists details of the diagnostic codes.
Code    System    Diagnosis    Trouble Area
1   Normal   There are no problems.   None.
2   Pressure sensor signal   Open or short circuit in pressure sensor.   1.   Pressure sensor circuit. 2.   Pressure sensor. 3.   ECU.
3   Ignition signal.   No signal from ignitor four times in succession.   1.   Ignition circuit (IGf ECU connection). 2.   Igniter. 3.   ECU.
4   Water thermo sensor signal   Open or short circuit in coolant temperature sensor signal.   1.   Coolant temperature sensor circuit. 2.   Coolant temperature sensor. 3. ECU.
5   There is no code 5 (this sounds like the Monty Python "Bruces" sketch!).
6   RPM signal.   No Ne, G signal (engine revolution sensor) signal to ECU within several seconds after engine is cranked. No Ne, G signal (engine revolution sensor) signal to ECU within several seconds after engine reaches 1,000rpm. 1.   Distributor circuit. 2.   Distributor. 3.   Starter signal circuit. 4.   ECU.
7   Throttle position sensor signal.   Open or short circuit in throttle position sensor signal circuit.   1.   Throttle position sensor circuit. 2.   Throttle position sensor. 3.   ECU.
8   Intake air thermo sensor signal   Open or short circuit in intake air temperature sensor signal.   1.   Air thermo sensor circuit. 2.   Air thermo sensor. 3.   ECU.
9   Vehicle speed sensor signal   Speed sensor indicates 0 km/h for several seconds when engine rpm is above 2,300 or 2,800 and manifold pressure is higher than specified. 1.   Vehicle speed sensor circuit. 2.   Vehicle speed sensor. 3.   ECU.
10   Starter signal.   No STA signal to ECU when engine is running over 800rpm.   1.   Main relay circuit. 2.   IG switch circuit (starter). 3.   IG switch. 4.   ECU. 5.   The vehicle has been push-started.
11   Switch signal.   Air conditioning switch on or IDL points in the throttle position sensor off. Not registered in memory.   1.   Air conditioning switch circuit. 2.   Air conditioning switch. 3.   Throttle position sensor. 4.   ECU.
« Last Edit: October 01, 2014, 12:34:59 AM by twincharger »

kevinmetal

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Re: misfires galore and engine dies
« Reply #2 on: October 01, 2014, 01:07:05 AM »
I'll look into tomorrow see how the wiring looks and then try resetting it and see what happens

overspool

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Re: misfires galore and engine dies
« Reply #3 on: October 01, 2014, 09:59:46 AM »
What engine? 4AGE? Check the ground on the intake manifold.

Briscore

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Re: misfires galore and engine dies
« Reply #4 on: October 06, 2014, 05:02:16 AM »

What a wonderful thing it is to be used in daily life.

Wangchung_Tonight

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Re: misfires galore and engine dies
« Reply #5 on: October 06, 2014, 10:29:48 AM »
^^^ This guy has posted jibberish in two threads today.
The legendary pizza delivery 8-6 of Akina.

Hackeduphachi

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Re: misfires galore and engine dies
« Reply #6 on: October 07, 2014, 10:29:19 AM »
What is this? What does that even mean?