Question about 1995 Chevrolet Caprice Classic

1 Answer

I have a ruff idle and hesitate at times

I have changed egg,pcv,evap canister& selinoid,plugs,wires and now what

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  • Chevrolet Master
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Could be a long list of things.
Low fuel pressure, injector problems, ignition problems, even valves or a weak cam.
Someone will have to figure out if it is fuel, ignition, or engine related to proceed.

Posted on Dec 05, 2012

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SOURCE: suburban idling irraticly

check the catalytic converter they clog and keep them from running right.i have a 94 suburban that wqas doing the same thing and it was a clogged converter

Posted on Aug 27, 2008

  • 1 Answer

SOURCE: 1989 Cavalier Z24 3.1 rough idle and hesitation

its just white cuz i too the cat off..

cuz i thought my proble could have been to do with the cat...

cuz i lost power driving up hills and on highways now it just will start the die right away

or start and idle really bad...

any ideas???

i was thinking crank sensor.. or injectors

Posted on Oct 01, 2008

  • 1 Answer

SOURCE: 1989 Cavalier Z24 3.1 rough idle and hesitation

I had the same problem with my Z when i had it. But it worked when i just left the little hose off of the EGR valve.

Posted on Jun 13, 2009

  • 58 Answers

SOURCE: i have a 1996 chevy cavalier that

Without seing it, this is impossible to answer. Get to know a good Mechanic.

Posted on Oct 06, 2009

  • 37 Answers

SOURCE: 2004 Chevy Cavalier 2.2 eco Automatic 94,000 miles

in my experience the usual culprit is the evap cannister. the problem is it gets moisture in it and freezes during winter thus cracking the plastic. if you lay under the car and look at the evap box it black plastic and if you see a loose or cracked hose or the box itself is cracked that is most likely it. as a side note you can check the gas cap and buy a new one to see if that rectifies the situation. lastly i don't think the gas tank should be suspect as you would probably notice if gas was leaking out of the tank. if you take the car to a dealer or shop they can do a smoke test and determine where the leak is.

Posted on Oct 19, 2010

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The plugs and crank sensor could have done it, but the TPS and idle air control would have nothing to do with a random miss.
A more likely cause is the ignition module or a fuel problem. You may have to wait until the problem is bad enough to kill the engine or you have more codes to check out.

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2002 isuzu rodeo cylinder head torque lbs. for 2.2


Print


Removal & Installation

2.2L Engine

  1. Before servicing the vehicle, refer to the Precautions section.
  2. Drain the cooling system.
  3. Relieve the fuel system pressure.
  4. Remove or disconnect the following: Negative battery cableIntake Air Temperature (IAT) sensor connectorPositive Crankcase Ventilation (PCV) valve and hoseAir intake assemblyUpper radiator hoseAccessory drive beltExhaust front pipeAlternator and bracketsCrankshaft Position (CKP) sensor connectorKnock sensor connectorHeater hosesWater bypass hoseFuel linesEvaporative Emissions (EVAP) valve connectorCanister hoseIntake manifoldEngine wiring harness connectors at left rear of the engine compartmentPower steering pump pressure switch connectorFront coverSpark plugs and wiresCamshaft Position (CMP) sensorValve coverTiming belt. Refer to the Timing Belt unit repair section.Timing belt idler pulleysTiming belt rear coverOil pressure switch connectorCamshaftsCylinder head. Remove the bolts in reverse of the tightening sequence.

    Negative battery cable Intake Air Temperature (IAT) sensor connector Positive Crankcase Ventilation (PCV) valve and hose Air intake assembly Upper radiator hose Accessory drive belt Exhaust front pipe Alternator and brackets Crankshaft Position (CKP) sensor connector Knock sensor connector Heater hoses Water bypass hose Fuel lines Evaporative Emissions (EVAP) valve connector Canister hose Intake manifold Engine wiring harness connectors at left rear of the engine compartment Power steering pump pressure switch connector Front cover Spark plugs and wires Camshaft Position (CMP) sensor Valve cover Timing belt. Refer to the Timing Belt unit repair section. Timing belt idler pulleys Timing belt rear cover Oil pressure switch connector Camshafts Cylinder head. Remove the bolts in reverse of the tightening sequence.

To install:


0996b43f802097a8.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Cylinder head torque sequence-2.2L (VIN D) engine

NOTE Use new cylinder head bolts for assembly.

  1. Install the cylinder head with a new gasket. Tighten the bolts in sequence as follows: Step 1: 18 ft. lbs. (25 Nm)Step 2: Plus 90 degreesStep 3: Plus 90 degreesStep 4: Plus 90 degrees
    1. Step 1: 18 ft. lbs. (25 Nm)
    2. Step 2: Plus 90 degrees
    3. Step 3: Plus 90 degrees
    4. Step 4: Plus 90 degrees

  2. Install or connect the following: CamshaftsOil pressure switch connectorTiming belt rear coverTiming belt idler pulleys. Tighten the bolts to 18 ft. lbs. (25 Nm).Timing beltValve coverCMP sensorSpark plugs and wiresFront coverPower steering pump pressure switch connectorEngine wiring harness connectors at left rear of the engine compartmentIntake manifoldCanister hoseEVAP valve connectorFuel linesWater bypass hoseHeater hosesKnock sensor connectorCKP sensor connectorAlternator and bracketsExhaust front pipeAccessory drive beltUpper radiator hoseAir intake assemblyPCV valve and hoseIAT sensor connectorNegative battery cable

    Camshafts Oil pressure switch connector Timing belt rear cover Timing belt idler pulleys. Tighten the bolts to 18 ft. lbs. (25 Nm). Timing belt Valve cover CMP sensor Spark plugs and wires Front cover Power steering pump pressure switch connector Engine wiring harness connectors at left rear of the engine compartment Intake manifold Canister hose EVAP valve connector Fuel lines Water bypass hose Heater hoses Knock sensor connector CKP sensor connector Alternator and brackets Exhaust front pipe Accessory drive belt Upper radiator hose Air intake assembly PCV valve and hose IAT sensor connector Negative battery cable
  3. Fill the cooling system.
  4. Start the engine and check for leaks.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Drain the cooling system.
  3. Relieve the fuel system pressure.
  4. Remove or disconnect the following:

    Negative battery cable Intake Air Temperature (IAT) sensor connector Positive Crankcase Ventilation (PCV) valve and hose Air intake assembly Upper radiator hose Accessory drive belt Exhaust front pipe Alternator and brackets Crankshaft Position (CKP) sensor connector Knock sensor connector Heater hoses Water bypass hose Fuel lines Evaporative Emissions (EVAP) valve connector Canister hose Intake manifold Engine wiring harness connectors at left rear of the engine compartment Power steering pump pressure switch connector Front cover Spark plugs and wires Camshaft Position (CMP) sensor Valve cover Timing belt. Refer to the Timing Belt procedure. Timing belt idler pulleys Timing belt rear cover Oil pressure switch connector Camshafts Cylinder head. Remove the bolts in reverse of the tightening sequence.

To install:

0996b43f802097a8.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Cylinder head torque sequence-2.2L (VIN D) engine


NOTE Use new cylinder head bolts for assembly.

  1. Install the cylinder head with a new gasket. Tighten the bolts in sequence as follows:
    1. Step 1: 18 ft. lbs. (25 Nm)
    2. Step 2: Plus 90 degrees
    3. Step 3: Plus 90 degrees
    4. Step 4: Plus 90 degrees

  2. Install or connect the following:

    Camshafts Oil pressure switch connector Timing belt rear cover Timing belt idler pulleys. Tighten the bolts to 18 ft. lbs. (25 Nm). Timing belt Valve cover CMP sensor Spark plugs and wires Front cover Power steering pump pressure switch connector Engine wiring harness connectors at left rear of the engine compartment Intake manifold Canister hose EVAP valve connector Fuel lines Water bypass hose Heater hoses Knock sensor connector CKP sensor connector Alternator and brackets Exhaust front pipe Accessory drive belt Upper radiator hose Air intake assembly PCV valve and hose IAT sensor connector Negative battery cable
  3. Fill the cooling system.
  4. Start the engine and check for leaks.

May 26, 2012 | Isuzu Rodeo Cars & Trucks

2 Answers

Pontiac Bonneville SE coming up with ODB2 scanner codes P0301 and P0440


Hi Becca:
P0301 Code - Cylinder #1 Misfire Detected
A P0301 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #1.

Symptoms may include:
the engine may be harder to start
the engine may stumble / stumble, and/or hesitate
other symptoms may also be present

A code P0301 may mean that one or more of the following has happened:
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

Possible Solutions:
- If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
- If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.


P0440 Code - Evaporative Emission Control System Malfunction
This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

You likely won't notice any drivability problems.

A code P0440 could mean one or more of the following has happened:
The gas cap is not installed or working properly
The purge solenoid has failed
The canister is plugged and not working properly

With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
Inspect the EVAP system for cuts/holes in tubes/hoses
Inspect for damaged or disconnected hoses around the Evap purge solenoid
Check and/or replace the sensor
Check and/or replace the purge valve
Have a professional use a smoke machine to detect leaks

Other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456-

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 15, 2012 | Pontiac Bonneville Cars & Trucks

1 Answer

2000 GMC Sierra V8 4.8L - I recently had my fuel pump & fuel filter replaced. I just changed my spark plugs and wires. Truck starts up fine, but it idles low now. When I'm driving it now hesitates...


What shape is air filter & pcv valve in? That and run a good fuel system cleaner through it - there seems to be ALOT of questionable fuel going around these days. Am hearing it from all over.

Apr 04, 2011 | GMC Sierra Cars & Trucks

2 Answers

Code says evaporator purge solenoid


Which code specifically? Do not assume you need a new solenoid. Our recommendation will depend on the specific code and some troubleshooting results. I usually recommend checking over all the EVAP vacuum lines and the gas cap too whenever there is a purge valve code. Check the vacuum lines at the cannister in the left rear bumper. I will paste info on the purge solenoid below.

P0440 Evaporative emission (EVAP) system - malfunction

Possible causes: Hose connection(s), intake leak, EVAP canister purge valve


P0441 Evaporative emission (EVAP) system - incorrect flow detected

Possible causes: Hose connection(s), intake leak, EVAP canister purge valve


P0442 Evaporative emission (EVAP) system - small leak detected

Possible causes: Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve


P0443 Evaporative emission (EVAP) canister purge valve - circuit malfunction

Possible causes: Wiring, EVAP canister purge valve, ECM


P0444 Evaporative emission (EVAP) canister purge valve -open circuit

Possible causes: Wiring open circuit, EVAP canister purge valve, ECM


P0445 Evaporative emission (EVAP) canister purge valve -short circuit

Possible causes: Wiring short circuit, EVAP canister purge valve, ECM


P0450 Evaporative emission (EVAP) pressure sensor - circuit malfunction

Possible causes: Wiring, EVAP pressure sensor, ECM


P0455 Evaporative emission (EVAP) system - large leak detected

Possible causes: Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve


P0456 Evaporative emission system - very small leak detected

Possible causes: Mechanical fault, hose connection(s), EVAP pressure "sensor


P0457 Evaporative emission system - leak detected (fuel cap loose/off)

Possible causes: Mechanical fault, hose connection(s), EVAP pressure sensor


P0458 Evaporative emission system, purge control valve -circuit low

Possible causes: Wiring short to earth, EVAP valve


P0459 Evaporative emission system, purge control valve -circuit high
Possible causes: Wiring short to positive, EVAP valve


Evaporative Emission Purge Solenoid

Description & Operation
The duty cycle EVAP canister purge solenoid (DCP) regulates the rate of vapor flow from the EVAP canister to the intake manifold. The Powertrain Control Module (PCM) operates the solenoid.
During the cold start warm-up period and the hot start time delay, the PCM does not energize the solenoid. When de-energized, no vapors are purged. The PCM de-energizes the solenoid during open loop operation.
The engine enters closed loop operation after it reaches a specified temperature and the time delay ends. During closed loop operation, the PCM cycles (energizes and de-energizes) the solenoid 5 or 10 times per second, depending upon operating conditions. The PCM varies the vapor flow rate by changing solenoid pulse width. Pulse width is the amount of time that the solenoid is energized. The PCM adjusts solenoid pulse width based on engine operating condition.
Removal & Installation
The duty cycle evaporative (EVAP) canister purge solenoid is located in the engine compartment near the brake master cylinder.

  1. Disconnect electrical connector at solenoid.
  2. Disconnect vacuum lines at solenoid.
  3. Lift solenoid slot from mounting bracket for Removal & Installation.

To Install:
  1. Position solenoid slot to mounting bracket.
  2. Connect vacuum lines to solenoid. Be sure vacuum lines are firmly connected and not leaking or damaged. If leaking, a Diagnostic Trouble Code (DTC) may be set with certain emission packages.
  3. Connect electrical connector to solenoid.
Purge solenoid location:

jturcotte_65.gif
EVAP cannister location:
jturcotte_66.gif

Nov 05, 2010 | 2000 Jeep Grand Cherokee

2 Answers

Positive crankcase ventilation system


the part that you describe is the valve cover, yes they do leak oil, especially if the pcv system is not working properly

May 15, 2009 | 1997 Ford Escort

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