I get hesitation on acceleration and feels like somthing plugged up?
tell me,,does the engine lght stay on?
if so,can you give me the computer codes?
codes are po30, po106, po402
one second please
you have replaced the map sensor?
not that i'm aware of
has it had a tune up lately?
not in a year
how many miles is on it?
please explain to me the best you can,,,how it runs...does it just have a dead missfire?..please explain
when i accelerate it holds back and sort of lurches along feels like something is plugged up ?
does it idle well?
not really, sounds rough
i think you may have a couple of things going on here
1-remove and clean the egr valve with carb cleaner...it seems the valve may have carbon on it not letting it close all the way
thus,causing a major vacuum leak from the exhaust
2-tune it up...new plugs and plug boots..
bad plug boots can give a fit...
and,,there is no good way to test them
the 301 code means you have a missfire on cylender #1
Linear Exhaust Gas Recirculation (EGR) ValveREMOVAL PROCEDURE 1. Disconnect the negative battery cable.
2. Disconnect the electrical connector at the EGR valve.
3. Remove the bolts from the common chamber. 4. Remove the EGR valve from the common chamber manifold. 5. Remove the gasket from the common chamber manifold.INSTALLATION PROCEDURE 1. Install the gasket on the common chamber. 2. Install the EGR valve on the common chamber.
3. Secure the EGR valve and the gasket with the bolts. Torque: 25 N.m (18 lb ft). NOTE: It is possible to install the EGR valve rotated 180° from the correct position. Make sure that the base of the valve is placed so that it aligns with the mounting flange.
4. Connect the electrical connector at the EGR valve. 5. Connect the negative battery cable.
DTC P0402 EGR Pintle Crank Error
Circuit DescriptionThe powertrain control module (PCM) monitors the EGR valve pintle position input to ensure that the valve responds properly to commands from the PCM, and to detect a fault if pintle position is stuck open. If the PCM detects a pintle position signal indicates more than 21.5% and more than for 625 msec during cranking, the PCM will set DTC P0402.Conditions for Setting the DTC - Ignition voltage is between 11 and 16 volts. - At Engine revolution less than 600 RPM, EGR pintle position indicates more than 21.0% and more than for 625 msecs.Action Taken When the DTC Sets - The PCM will illuminate the malfunction indicator lamp (MIL) after the second consecutive trip in which the fault is detected. - The PCM will store conditions which were present when the DTC was set as Freeze Frame and in Failure Records data.Conditions for Clearing the MIL/DTC - The PCM will turn the MIL "OFF" on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present. - A history DTC P0402 will clear after 40 consecutive warm-up cycles have occurred without a fault. - DTC P0402 can be cleared by using the Tech 2 "Clear Info" function or by disconnecting the PCM battery feed.Diagnostic AidsCheck for the following conditions: - Foreign material on EGR valve between pintle and seat may cause EGR stuck open. Inspect foreign material in EGR valve. - Excessive carbon deposit may cause unsmooth operation of EGR valve shaft. Inspect carbon deposit and clean up inside of carbon deposit. - Poor connection or damaged harness-inspect the wiring harness for damage If the harness appears to be OK, observe the EGR actual position display on the Tech 2 while moving connectors and wiring harnesses related to EGR valve. A change in the display will indicate the location of the fault.NOTE: If the EGR valve shows signs of excessive heat, check the exhaust system for blockage (possibly a plugged catalytic converter) using the "Restricted Exhaust System Check".
DTC P0402 - EGR Pintle Crank Open Error
I will definately try this - thank you!
do those two things first..before you address the map code
i will give you some test to do on the map sensor,,if this code comes back after the tune up and the egr service
DTC P0106 MAP System Performance
Circuit DescriptionThe manifold absolute pressure (MAP) sensor responds to changes in intake manifold pressure (vacuum). The MAP sensor signal voltage to the powertrain control module (PCM) varies from below 2 volts at idle (high vacuum) to above 4 volts at wide-open throttle (low vacuum) at sea level.The MAP sensor is used to determine: manifold pressure changes while the linear exhaust gas recirculation (EGR) flow test diagnostic is being run (refer to DTC P0401), engine vacuum level for some other diagnostics, and barometric pressure (BARO). The PCM compares the MAP sensor signal to a calculated MAP based on throttle position and various engine load factor. If the PCM detects a MAP signal that varies excessively above or below the calculated value, DTC P0106 will set.Conditions for Setting the DTC - No TP sensor DTCs are present. - Engine speed is steady, changing less then 100 RPM. - Engine speed is between 1000 rpm and 4000 rpm. - Throttle position is steady, throttle angle changes less than 1%. - EGR flow rate is steady, changing less than 4%. - No change in brake switch, A/C clutch, TCC or power steering pressure switch status. - Above conditions are met for longer than 1 second. - Actual MAP value varies more than 10 kPa. - The MAP value must vary for a total of 10 seconds over a 20-second period of time that the samples were monitored. - The failure must occur for 2 consecutive trips.Action Taken When the DTC Sets - The PCM will illuminate the malfunction indicator lamp (MIL) after the second consecutive trip in which the fault is detected. - The PCM will default to a BARO value of 79.3 kPa. - The PCM will store conditions which were present when the DTC was set as Freeze Frame and in the Failure Records data.Conditions for Clearing the MIL/DTC - The PCM will turn the MIL "OFF" on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present. - A history DTC P0106 will clear after 40 consecutive warm-up cycles have occurred without a fault. - DTC P0106 can be cleared by using the Tech 2 "Clear Info" function or by disconnecting the PCM battery feed.Diagnostic AidsCheck for the following conditions: - Poor connection at PCM - Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal-to-wire connection. - Damaged harness - Inspect the wiring harness for damage. If the harness appears to be OK, observe the MAP display on the Tech 2 while moving connectors and wiring harnesses related to the sensor. A change in the display will indicate the location of the fault.If DTC P0106 cannot be duplicated, the information included in the Failure Records data can be useful in determining vehicle mileage since the DTC was last set. If it is determined that the DTC occurs intermittently, performing the DTC P1107 Diagnostic Chart may isolate the cause of the fault.
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