Question about 1995 Dodge Dakota

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Http://www.fixya.com/cars/t1375776-iac_opening_full_causing_vacuum_power Can you help this guy out? Happy Holidays

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  • markcross390 May 03, 2009

    egr diaphram melted so I replaced it with new one and same problem occurred. 1995 dodge dakota 2.5 litre

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I will try to figure it out, after reading it sounds like the EGR valve is stuck open, this would cause the IAC to go full open in an attempt to keep the engine idle speed up.. have seen it on 5.0 TBI Fords

Posted on Dec 16, 2008

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2 Answers

Reported codes: P1509, P0113, P0118, and P1298 simultaneously. Just replaced throttle body assembly. Any help? Also, why doesn't this Jeep read OBDII codes on odometer when turning the key 3x's?


The key on off method doesn't work on this model.
P0113 Intake Air Temperature Circuit High Input, most likely cause the IAT sensor was left unplugged in the air intake to engine.
P0118 Engine Coolant Temperature Circuit High Input . Likely cause the ECT sensor is disconnected or the wiring is damaged.
P1298 Lean operation at wide open throttle. Possible causes are vacuum leaks and low fuel pressure at wide open throttle.


P1509 Idle Air Control (IAC) System High RPM. Possible vacuum leaks or defective IAC valve.

Apr 27, 2016 | Jeep Cars & Trucks

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1997 mystique auto transmission jerks and motor stalls especially after hill?


According to MFR Technical Service Bulletins, the most likely case of the Transmission jerk is a faulty MAF sensor, i.e. entire vacuum system as well as the MAF.
A MAF fault may or may not be strong enough to trigger a DTC but If you do have a check engine light present, run down to the nearest Auto Parts store and ask for an associate to read and print out your trouble codes. Again, according to the MFR, harsh shifting may also be a symptom of:
Torque Converter Clutch (DTC 628 or P0741)
Transmission over temp (DTC 657 or P1783)
Trans Turbine Shaft Speed Sensor (check ohmic values)

Catalytic Issue?
A sulfur smell along with a stall issue is caused by Electronic engine control V, or the Powertrain control module and/or the HEGO sensors. For stall - reprogram PCM.
For stall and smell - replace both HEGO sensors.

No Trouble codes/No check engine light?
In my experience, cleaning the throttle body (especially the small hole near the butterfly valve's resting edge) with carb cleaner, and securing all vacuum leaks is a good first step, Next checkout the EGR system, the EGR valve may be sticking open for a few seconds. Use an inkjet refill syringe connected to the EGR valve via vacuum hose. Pull a quick vacuum. Engine should stumble and then recover quickly when vacuum is relieved. Delayed reactions indicate carbon buildup.

Another quick and cheap check --
Idle air control valve:

turn off engine, disconnect IAC, restart. If no change in rpm at idle, IAC is likely to be faulty

Use an ohm meter to check the solenoid by attaching the positive lead to the VPWR (vehicle power pin) and the negative lead to the IAC pin.
Your resistance reading should be between 7.0 ohms and 13.0 ohms. If your reading is off, your IAC solenoid is bad.

Hope this helps,
-K

MAF Sensor TSB:
http://www.revbase.com/BBBMotor/TSb/DownloadPdf?id=44679

Ohmic values for Trans speed sensors:
http://www.revbase.com/BBBMotor/TSb/DownloadPdf?id=114945

Nov 23, 2015 | 1997 Mercury Mystique

1 Answer

How to remove the radio on a Toyota urban cruiser


https://www.youtube.com/watch?v=soyAXAfLxG8

this video shows a guy with a pair of scissors doing it, would be better if you had a better tool selection than he does. anyway principle is the same, Happy holidays.

Nov 21, 2014 | Toyota Cars & Trucks

1 Answer

Hey all i have a 2001 ford f150 and am having problems with it skipping and shutting off when you come to a stop. I have already changed all 8 spark plugs and cleaned all the coil packs, i also changed the...


check for vacuum leaks and maybe the EGR valve.

Please see my tip at http://www.fixya.com/cars/r7427423-fix_poor_idle_high_idle_stalling_fuel . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Dec 31, 2010 | 2001 Dodge Dakota

1 Answer

Where is the iac valve


Up on the throttle body. Has one 2 prong plug going to it and is held on with 2-8mm bolts. Hope that's enough. If I've helped, please rate my assistance and leave a testimonial. Happy Holidays!

Dec 27, 2010 | 2001 Ford Escape

1 Answer

I have A 1993 gmc jimmy,It has A rough idle,idels low,& the rpm seems to pulsate.The service light cam on I ran it & came up with code # 32.what would cause this.


this is related to the egr system and makes sense when you describe a rough idle. the egr is probably stck open slightly. remove and attempt to clean with carburretor cleaner. it also helps to have a vacuum pump so you can work the diaphragm up and down. happy holidays

Dec 28, 2009 | 1993 GMC Jimmy

1 Answer

I need pcm pin connector ends for a 1999 savana 6.5 diesel 3500 van,


give these guys a call they sells only GM-parts its Schram auto & truck parts 1-800-292-1032 and they website is www.schramauto.com Happy holidays as always wish you the best of luck Michigan Man.

Dec 26, 2009 | 1999 GMC Savana

1 Answer

Idle is too low, car dies, engine runs fine


An IAC (idle air control) motor is designed to adjust the engine idle RPM speed by opening and closing an air bypass passage inside the throttle body. The car computer or ECM (electronic control module) receives information from various sensors and will output signals to adjust the IAC motor in or out to adjust engine idle speed by controlling engine idle air.
An IAC motor is highly susceptible to carbon and coking build up; if an IAC goes too long without cleaning it can cause stalling and poor idle quality. Some cars are designed with a large vacuum transfer hose that connects the intake manifold to the IAC (idle air control) motor. If a broken or dilapidated these vacuum lines can cause the engine to lose vacuum which will allow the engine to run rough and die. 
Inspect all engine and accessory vacuum lines to look for missing, torn or dilapidated lines and replace as needed. To check the IAC motor remove the unit, with the wires connected turn the key to the "on" position without starting the engine, the IAC should move in or out. 
If the IAC motor does nothing it has probably failed, replace it with a new unit and recheck system. Note: while the IAC motor is removed clean (use aerosol carburetor cleaner) the passages the IAC uses to control idle air speed.

Good luck and hope this helps

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