My vehicle (1998 GMC K1500 ) intermittently turns off while driving. This occurs at a variety of speeds. The engine quits as if you turned off the key, but only for a second or two. Sometimes the engine will restart if speed is sufficient and the transmission remains in gear (Automatic). Most of the time, I am required to put the transmission in Neutral (While continuing to roll down the road), crank the engine, put back into Drive and continue. The vehicle always re-cranks intermittently. The dash lights react as if the ignition was turned off, example - all the lights come on then go off when the system initializes such as the ABS light and Air Bag light. Battery and alternator and connections have been checked. The problem may occur once a week or 3 times in one day. This problem may not occur for 3 to 4 weeks.
An expert who has achieved level 3 by getting 1000 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert whose answer got voted for 100 times.
Re: Vechile turns off while driving
Does it happen to occur when you maybe hit a bump? It sounds so much like a previous car I worked on he hs so many keys on the ring that when he hit a bump the weight of all the keys pulled on the switch and shut it off the only other way to find this is start the truck and start to shake wiring harnesses under the dash and under the hood it sounds like a loose connection in the primary ignition circuit
Please rate this post if it is helpful to you and contact me at firstname.lastname@example.org if I can be of any further help in this matter
a 6ya Mechanic can help you resolve that 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 repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
What engine ? Chevy K1500 ?
DTC P1345 Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation
This diagnostic trouble code (DTC) monitors the crankshaft position (CKP) and the camshaft position (CMP) signals to determine if they are synchronized. If both signals are not observed by the control module within a narrow time window, the vehicle control module (VCM) will determine that an error has occurred.
Check the following items:
• A loose CMP sensor causing a variance in the sensor signal
• Excessive free play in the timing chain and gear assembly
• Incorrectly installed distributor - 1 tooth off in either advance or retard positions
• A loose distributor rotor on the distributor shaft
• A loose or missing distributor hold down bolt
An intermittent may be caused by any of the following conditions:
• A poor connection
• Rubbed through wire insulation
• A broken wire inside the insulation
Thoroughly check any circuitry that is suspected of causing the intermittent complaint. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.
If a repair is necessary, refer to Wiring Repairs or Connector Repairs in Wiring Systems.
Oct 1, 2008 - When a customer brings you a vehicle and complains of a stalling problem, you ... If the engine stalls while idling or driving, the engine may be runningout of fuel ... But even if the sensor tests "good," it may still cause trouble.
www.wikihow.com > ... > Cars > Car Maintenance and Repair
wikiHowThere are many things that could cause a car to stall. ... Your engine stops runningbecause it is not igniting gas in the cylinders, this ... It seems counterintuitive, but even the wires and distributor decay over time, and transmit less electricity.
Here's a link to the code,Your boost sensor apparently malfunctioned or possibly sent a signal (for whatever reason ) that the ECM interpreted as a out of range signal . In this case the sensor signal was too high . I would personally clear the codes from the ECM and operate the vehicle under various driving conditions (especially acceleration under load conditions which would engage the turbocharger ) to see if the code resets again . If it does, I would replace the sensor . However , if it does not reset , and no other codes occur it could've been an intermittent malfunction or possibly a glitch in the ECM parameters which does occur from time to time in any computer .
If the bearing fails and seizes up, the rubber will be torn away from the bearing. The seized bearing can tear away the rubber mount that supports the outside of it allowing the bearing to rotate with the driveshaft. This allows the driveshaft to wobble up and down causing a vibration.
The rubber can also deteriorate due to age or contamination with oil. The driveshaft will operate at the wrong angle and vibration or noise will result. The vibration occurs most often during hard acceleration.
A worn center support bearing can cause a whining sound that varies with vehicle speed. The noise is constant in pitch, rather than changing or intermittent like U-joint noise.
If the truck has been raised , the alignment of the drive shaft will also change, A damaged driveshaft can exhibit a variety of symptoms. A clunk that is heard when the transmission is shifted into gear is the most obvious. You can also encounter unusual noise, roughness, or vibration. NOTE
The engine, torque converter and driveshaft change in frequency as rpm changes. A rebuilt torque converter is often the cause of a vibration that is rpm-related.
To help differentiate a potential drivetrain problem from other common sources of noise or vibration, it is important to note the speed and driving conditions at which the problem occurs. Unfortunately, it is often difficult to accurately pinpoint drivetrain problems with only a road test. Expand the undercar investigation by putting the vehicle up on the lift, where it is possible to get a good view of what is going on underneath.
Check the companion flange, carrier bearing, pinion shaft seal, and pinion bearing, transmission's extension housing seal and bushing, and the u-joints.
Check the driveshaft for runout, or the amount that a part wobbles up and down or side to side when it is in motion.
your missing a repair manual that shows the computer circuits for the whole car--a scan doesnt always tell u the complete solution-maybe git onother--the instrument cluster may be failin or u hav some grounding issue
i had a customer with a 2004 gmc sierra 2500hd 2wd that stated that the srevice brake system light came on while driving. the transmission would shift hard and erratic plus the speedometer was erratic. the check engine light came on with two codes p0502 and p0503(vehicle speed sensor A low input and vehicle speed sensor A intermittent/erratic. i replaced both vehicle speed sensors mounted on the driver's side of the transmission. both of the speed sensors were the same. test drove the truck after and all issue were solved.
Have a local parts store do a diagnostic scan on your vehicle to see what the problem was that set the check engine light on. Most parts stores will do this as a free service. They may even be able to turn the light off, if the problem was an intermittent one that was just a one time thing. If they cant turn the light off then the problem will need to be solved before the light will turn off.