Question about Dodge Dakota

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My truck runs erraticly. i changed thi ais,map sensor,throttle posistion sensor what else would cause this

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Head gasket leak and is sucking in air somewhere rough running because extra air intake throwing off air/fuel ratio.gotta seal leak or for best result replace head gasket.

Posted on Mar 18, 2011

  • Rottweiller Mar 18, 2011

    sorry i appologiz i meant to say intake manifold gasket not headgasket.

  • jimmy_winfre Mar 19, 2011

    i just had a new intake manifold put on and i changed the map sensor,throttle position sensor and the ais . Could it be the fuel pressure regulator sensor cause the problem?

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1 Answer

Why is the engine running erratically?


the map sensor fail means (DTC code not stated sadly)
mean the voltage is stuck at 5v or 0v.
near
the ECU never lies about this, ever.
the ECU enters FAILSAFE mode , in this case. (limphome)
and runs rich has heck , horrid rich, misfires.
RPM limited
idle controls disabled.
and retarded spark timing.

pretty much worst of the worst for EFI ops.
all you need to do is post the DTC error. and all that is what matters.
new MAP time, or fix the vacuum hose. its clogged? cracked.
make sure the vacuum leaves the intake manifold (sucks) and
makes it all the way to the MAP on the fire wall and that the
tiny filter(check valve?) inline is clogged, (blown through it)

This is a G16A ENGINE, With an ECU that does not create or control spark, (old style distributor with mech, and vac, advance)

DTC 31 or 32??????????????????????
http://www.fixkick.com/CEL/CEL.html#OBD1codes

if vacuum line is breached to map , the vacuum is not 0" HG
the MAP outputs 3.9V

the ECU trip points i do not know. but
above 3.9 or below .5v it will trip... somewhere,

here is very good map , graph

http://www.fixkick.com/sensors/my-map.html


all testing of it is here
http://www.fixkick.com/sensors/tests/MAP-testing.html

with photos and how to back probe it with an volt meter.

Apr 29, 2015 | 1990 Geo Tracker

1 Answer

Erratic idle & shutting off


have you replaced the egr valve

Feb 08, 2014 | 1990 Ford F150

1 Answer

I have an 03 pontiac gtp supercharged. I have replaced the mass air flow sensor twice but after a while again I get erratic idle problems usually at first start up. this is a pieced together engine. The...


(1) clean the throttle assembly. They are very sensitive to build up also and they are very cheap change out the throttle body sensor. The TBS allows are to by pass both of these will cause erratic ideal. The mass air flow will not cause erratic idle but your car will be very loud and run rough. Failing this (cheap fix) I would suggest to look at the ignition coils.

Dec 24, 2013 | 2003 Pontiac Grand Prix GT

2 Answers

Cherry red exhaust


check that your map sensor is getting direct vacuum. if it's mounted directly on the throttle body, take it off and see that the vacuum passage is not clogged up. also check that it is getting voltage and that the computer sees it. Your map sensor and tps are responsible for how much fuel goes into the engine when you are driving; the o2 pretty much only regulates idle mixture. also see that your egr is not stuck open.

Mar 17, 2013 | Cars & Trucks

2 Answers

Replaced head gasket now it will not start?


was it the correct gasket? if its even off by a little it could def cause no start. if so the you need to check map sensor and also throttle posistion sensor

Oct 24, 2012 | Cars & Trucks

2 Answers

I have a jeep grand cherokee i have a code p1296. voltage missing at throttle position sensor.explanation engine running and the ecm detected map sensor voltage less than expected. probable cause open or...


I would change the TPS throttle position sensor and the Map/MAF are you sure its not the mass air flow?. I think your computer is fine it could be have a loose ground issues but computers dont go bad.

Sep 12, 2011 | 1997 Jeep Grand Cherokee

1 Answer

1993 S-10 Blazer has erratic idle and stalls


Check the tps "trottle positioning sensor, on mine the idle would not stay steady, and shift so hard that it would sound like it was going to break something. it is located on the drivers side of the throttle body with a push in electrical connector.

Dec 06, 2009 | 1993 Chevrolet S-10 Blazer

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