Question about 1999 Pontiac Grand Prix

1 Answer

'99 grad prix 3.1 engine missing. P1374 code manufature Ignition

Manufacture Ignition control or misfire code. How can I fix that ?

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Cheetah:

    An expert who has answered 20 or more questions within one hour.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 72 Answers

The code reader should tell you what cylinder it is if so switch the injectors around to see if the misfire moves to a different cylinder if it does you have a bad injector

Posted on Jun 22, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

I got a 2001 olds silhouette, 3.4, with p1374. Checked ecm and replaced cps on the side of the block. ran great for about 4 miles, then it started stumbling and then stalling.


DTC P1374
The 3X reference signal is produced by the ignition control (IC) module. The IC module calculates the 3X reference signal by dividing the crankshaft position (CKP) sensor 7X pulses by 2 when the engine is running and when the CKP synchronizing pulses are being received. The powertrain control module (PCM) uses the 3X reference signal to calculate the engine RPM and the crankshaft position at engine speeds above 1600±150 RPM. The PCM also uses these pulses to initiate injector pulses. The PCM compares the 3X reference pulses to the 24X CKP pulses and the camshaft position (CMP) sensor pulses. If the PCM receives an incorrect number of pulses on the 3X circuit, a DTC P1374 will set and the PCM will use the 24X CKP reference circuit for fuel and ignition control. The engine will continue to start and run using only the 24X CKP and the camshaft position sensor signals.

Diagnostic Aids
• DTC P1374 can be caused by secondary components leaking high voltage into the IC module.
• Inspect for the following conditions:
- Incorrect harness routing near secondary ignition components
- Ignition coil arcing to wiring harness or IC module--Inspect the ignition coils for the following conditions:
• Cracks
• Carbon tracking
• Other signs of damage
- Ignition coil arcing to wiring harness or IC module--Inspect the ignition coils for the following conditions:
- Secondary ignition wires arcing to wiring harness
I would sugest you take your vehicle to a qualified repair shop an have it diagnosed , but i can tell that's not your way , is it . We diagnose not replace part's .
Replace the IC module. Refer to Ignition Control Module Replacement .
Did you complete the replacement?
Go to Step 11
--
10
Replace the PCM. Refer to Powertrain Control Module Replacement .
Did you complete the replacement?
Go to Step 11
If it starts an runs it's not the crank sensor behind the crankshaft pulley .

May 31, 2016 | 2001 Oldsmobile Silhouette

1 Answer

2006 grand prix gxp 5.3. When you are driving normally it will miss from 50mph and up. When you punch it it doesn't miss a beat. I cleaned the maf sensor and air filter, Plugs were replaced.


It's probably a coil breaking down , have a scan tool hooked up an have misfires checked to see which cylinder is missing .
Ignition Coils
Each ignition coil has an ignition 1 voltage feed and a ground. The engine control module (ECM) supplies a low reference and an ignition control (IC) circuit. Each ignition coil contains a solid state driver module. The ECM will command the IC circuit ON, this allows the current to flow through the primary coil windings for the appropriate time or dwell. When the ECM commands the IC circuit OFF, this will interrupt current flow through the primary coil windings. The magnetic field created by the primary coil windings will collapse across the secondary coil windings, which induces a high voltage across the spark plug electrodes. The coils are current limited to prevent overloading if the IC current is held high too long. The spark plugs are connected to their respective coils by a short secondary wire. The spark plugs are tipped with iridium for long life and efficiency.
Drive it long enough like that (with it misfiring ) the check engine light will flash . This is to warn that a catalytic converter damaging event is taking place . This would also set a DTC - diagnostic trouble code
DTC Descriptors ?€¢
DTC P0300 Engine Misfire Detected


?€¢
DTC P0301 Cylinder 1 Misfire Detected


?€¢
DTC P0302 Cylinder 2 Misfire Detected


?€¢
DTC P0303 Cylinder 3 Misfire Detected


?€¢
DTC P0304 Cylinder 4 Misfire Detected


?€¢
DTC P0305 Cylinder 5 Misfire Detected


?€¢
DTC P0306 Cylinder 6 Misfire Detected


?€¢
DTC P0307 Cylinder 7 Misfire Detected


?€¢
DTC P0308 Cylinder 8 Misfire Detected

Apr 26, 2016 | Cars & Trucks

2 Answers

My 2001 grad prix stumbels at acceleration once in awhile and in park sometimes there is no engine codes and i've changed pretty much everything plugs wires coils fuel filter and i even cleaned th


You did oxygen sensors at 100,000 miles

No exhaust leaks

No intake or evap leaks

Changing parts doesn't answer the question
Do you have ignition misfires

Egr problems

Mar 13, 2013 | 2000 Pontiac Grand Prix

1 Answer

How do you reset the ecm in a pontac grand prix 2005 3.8L


Not sure what you are trying to do.
If the cylinder is not firing you would need to figure out if you are missing spark to the plug or fuel to the injector.
After the problem is fixed you can have someone scan the computer and clear the trouble code to turn the check engine light off.

Dec 25, 2012 | 2005 Pontiac Grand Prix

1 Answer

My 99 grand prix bucks and jumps in reverse and when idling in drive or park


The codes pretty much explain the bucking and jumping. The engine is obviously misfiring on several cylinders.

With the P0171 code, the lean condition (and therefore, the misfiring) could very possibly be caused by a bad Mass Airflow (MAF) sensor, a faulty fuel pump, a clogged fuel filter, or a HUGE vacuum leak.

However, the P0171 code can also be caused by excess unburned air/fuel mixture going down the exhaust due to cylinders misfiring for other reasons like a faulty ignition coil, ignition module or bad spark plugs (as well as other possibilities).

So, now you are faced with trying to determine if the lean condition is caused by the misfires or if the misfires are being caused by a lean condition. (PROPER DIAGNOSIS REQUIRED)

Mar 24, 2012 | Cars & Trucks

3 Answers

Getting codes P0341, p0300, p0301, p0302, p0303 on my 2001 audi a4 2.8 quattro, how do i fix this


Hello! The Trouble codes are pointing at ONLY cylinders 1-2-and 3 (P0301, P0302, and P0303)...P0300 is telling you Random Misfires...P0341 is pointing at the Camshaft Positioning Sensor A (Bank One)...When you face the front of the engine, the Left Bank are cylinders 1, 2, and 3...Although TSB's are written for this problem that isn't much help since you'll pay for it anyway...

The solution is to replace the Camshaft Positioning Sensor A...Of course, check its connector first for bent, dirty or broken pins...Buy a can of Electronic Contact Spray and clean both male and female ends of the connector before buting a new sensor....Follow procedure below...Push two safety pins into the rear of the connector on the specified pin #'s...See diagrams below....Saailer


10_24_2011_3_19_41_pm.jpgSTANDARD MOTOR PRODUCTS Part # PC345.....Cost $80



10_24_2011_3_41_08_pm.jpg


10_24_2011_3_41_51_pm.jpg

  1. Connect a Digital Volt Meter to measure voltage across the CMP connector terminals 1 (B+) and 3 (Ground).
  2. Switch ignition to "ON", but Do NOT start engine.
  3. Measure voltage between terminals 1 and 3 . There should be a minimum 9.0 volts.
  4. Switch the ignition "OFF".
  5. If reading is not 9.0 volts replace the sensor...
  6. You'll have to remove the timing chain to replace it...
any questions send a comment...Guru...Saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Oct 24, 2011 | 2001 Audi A4

1 Answer

99 pontiac grand prix that is still mis firing even after we changed plugs and wires, not sure what to do now please help


Misfires can be caused by several things including all the parts you have already replaced as well as faulty ignition coils, faulty injectors, vacuum leaks and engine mechanical problems such as low compression.
With the proper equipment, injector operation can be verified by performing injector balance tests, where the operation of the injectors in the misfiring cylinders is compared to the other cylinders that are not misfiring.
Also, engine mechanical failures such as bad piston rings or leaking/burnt valves can be diagnosed with a simple compression test.
An easy (and very inexpensive ) way to verify ignition coil operation is to swap the coil from the misfiring cylinder(s) with the coil(s) from the cylinder(s) that is(are) not misfiring. Then clear the fault codes and drive the vehicle. If the same cylinders are still misfiring, the coil is not the problem. If the misfire moves to the cylinder that you swapped with - replace the coil.
Sometimes, injectors can also be tested this way, but on most GM V-6 or V-8 engines, this is not practical due to the labor involved in "swapping" injectors.

May 10, 2011 | 1999 Pontiac Grand Prix

1 Answer

I GOT A 2000 SILVERADO 1500 OBD CODE IS 421 THE PROBLEM IS I DON'T KNOW LOCATION OR HOW TO FIX THE PROBLEM


Sounds like an O2 sensor, especially if your not experienceing major problems.

Example obd code P0101
1st digit: B-Body, C-Chassis, P-Powertrain, U-Network
2nd digit: 0-SAE (generic), 1 mfg (Manufacturer Specific)
3rd digit:
* 1 Air & Fuel Metering
* 2 Air & Fuel Metering Injector Circuit
* 3 Ignition System (Including Misfire)
* 4 Auxiliary Emissions Controls
* 5 Vehicle Speed Controls And Idle Control System
* 6 Computer Output Circuit
* 7 Transmission
* 8 Transmission
4th & 5th digit - two place fault code 0-99

Feb 02, 2011 | Chevrolet Silverado 1500 Cars & Trucks

3 Answers

CODES-PO301-PO303-PO316- CHANGED PLUGS & WIRES. STILL MISS ON START UP, GOES AWAY MOST OF THE TIME ABOVE 1000 R.P.M


P0301 - Cylinder 1 Misfire Detected.

Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak

Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

P0303 - Cylinder 3 Misfire Detected.
Follow info from P0301.

P0316 - Misfire Occurred In The First 1,000 Engine Revolutions.

Causes:
- Damaged CKP sensor.
- Ignition System.
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Base engine
- Damaged Powertrain Control Module

Solutions:
Usually the P0316 is combine with a P03XX codes. The P03XX code indicates in which cylinder the misfire occurred.

Jan 17, 2011 | 2002 Mercury Sable

2 Answers

99 cougar v6 P0352 misfire cylinder 3 and 4 replaced igntn coil..


Had the same problem, car was misfiring on cylinder 3 and 4. replaced wires, plugs, and ignition coil. still misfired on the same cynlinders. turned out the main engine wiring harness plug in was coming loose. spent well over $150 on the unneccesary repairs and ultimately fixed the problem wit a $3 bag of wire ties to hold the plug in...

May 04, 2009 | 1999 Mercury Cougar

Not finding what you are looking for?
1999 Pontiac Grand Prix Logo

Related Topics:

803 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

Marvin
Marvin

Level 3 Expert

82208 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22382 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8841 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...