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#AskAGuru : Jeep No Start
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By Counterman
Here’s the scenario: A customer comes into your store looking for an alternator for their vehicle. You look up the year, make and model and you see an application note on the screen. It tells you to ask the customer whether or not the vehicle is equipped with stop/start technology.
As with many of the technological advancements from the past decade or two, stop/start came about thanks to the need to meet ever-tightening emissions and fuel-economy standards. In the late 1990s to early 2000s, hybrid vehicles were on the rise. These vehicles could propel themselves purely on electric drive, then start the engine as needed
based on driving conditions and driver input.
The problem was that traditional starters weren’t up to the task. They cranked the engine over too slowly, and the process was rather jarring. So, reinforced starter motors and flexplates were designed to combat this issue.
Over time, automakers started to include stop/start systems in more and more vehicles. This is largely due to the fact that it was a simple way for OEMs to reduce carbon emissions from their entire lineup, and they receive certain incentives (or avoid costly penalties) for accomplishing this goal.
Engines today are far more fuel-efficient than those that came before them, but automakers still need to squeeze everything they can from every drop of fuel. Or, in this case, they’re trying to reduce how much fuel is wasted during everyday driving. In an urban environment, vehicles can end up sitting at idle up to 35% of the time. The energy from burning fuel at idle is wasted since the vehicle isn’t in motion, but the vehicle still is producing harmful emissions.
With the ability to stop and start the engine as needed, automakers are able to reduce the carbon footprint of their entire lineup. To you and me, it might not seem like much can be gained by stop/start technology. But, when you think about the number of vehicles on the road today, you can see the benefit a bit more clearly. It’s estimated that stop/start systems can reduce CO2 emissions by up to 10%, and maybe slightly more depending on conditions.
The engine stops whenever the vehicle comes to a stop, then restarts immediately as soon as the driver transitions from the brake pedal to the throttle. Most stop/start systems crank the engine over at a higher RPM when compared to the initial cranking speed. This helps to make the process less jarring and less noticeable to drivers and passengers alike.
Is a Stop/Start Alternator Different?
The short answer is yes, but how so varies from one automaker to the next. Many modern-day alternators will have some sort of integrated control module on board. However, a stop/start alternator may be responsible for starting the engine as well as recharging the battery. This unit is commonly referred to as a starter/alternator.
A starter-alternator is used by the PCM to crank the engine via the belt drive. The belt may contain more teeth (the belt may be wider) due to the load and stress applied while cranking. Starter-alternators boast faster engine startup than traditional starters, and they can do it without making as much noise or vibration. The traditional starter will crank the engine for the initial startup, then the starter/alternator will handle all of the restarts until the next driving cycle.
How long does a traditional alternator typically last? In most cases, one could expect an alternator to last for 90,000 to 120,000 miles, maybe more. A stop/start alternator should see a similar life expectancy. If the alternator fails within 10,000 to 20,000 miles, there might be another issue that’s causing the premature failure. This could include a bad battery; wiring issues (loose connections, corrosion, intermittent shorting, etc.); overload from non-factory electronics; and/or a faulty voltage regulator (though these days this is usually integrated into the alternator).
Tips and Tricks
Stop/start might not be very popular among consumers, but this technology has led to multiple innovations and changes across the industry. For example, electric air-conditioning compressors and water pumps have been developed so that they can operate while the engine is off.
So, what should you tell your customer if they’re replacing a stop/start alternator? Try to make sure they’re repairing the problem – not just a symptom – and sell them the complete repair. If their vehicle has a starter/alternator, they should be inspecting the condition of the entire belt drive. This includes the pulleys, the belt and especially the tensioner. If the belt isn’t tensioned properly, they could experience a number of symptoms, including noises, improper charging voltage, intermittent cranking issues and more.
Don’t forget about the battery and cables! Always replace the battery with one that’s comparable to the OE-specified unit. The main battery typically is either an absorbent glass mat (AGM) or an enhanced flooded battery (EFB). These batteries are more advanced, and better able to support the increased number of charging cycles and additional load placed on the system by the stop/start features. Clean all electrical connections and protect them if necessary to prevent future corrosion.
As always, it’s best practice to reference the OEM service information whenever servicing the alternator on a stop/start vehicle. Always respect the OEM’s recommendations when it comes to specific tooling, torque specifications and tightening sequences. Whenever possible, connect a scan tool to the vehicle and look for fault codes. A scan tool that’s capable of bi-directional communication might be required to reset the battery-recognition or battery-life monitor. CM
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By NAPA
Tanner Reif came away with a 12th-place finish in the General Tire 150 at Phoenix Raceway on Friday night, as he made his first start for Bill McAnally Racing (BMR) in the No. 16
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He battled a vibration and handling issues in the race, which marked the season opener for the ARCA Menards Series West. The event, with 32 entries, also served as a combination race with the ARCA Menards Series.
After starting 20th on the grid in Friday’s race, Reif steadily worked his way forward. He was up to 15th by Lap 11 and 13th on Lap 18. He was on the verge of breaking into the top 10 throughout the second half of the race, but could not gain additional ground and was 12th at the checkered flag.
Reif expressed confidence that the team will have a fast NAPA Auto Care Chevrolet at the next ARCA West race at Irwindale Speedway, where he scored one of his two series wins as a rookie last year and where BMR has collected 17 wins.
“The NAPA Auto Care Chevrolet ran hard and the crew worked as hard as they could, but we just had a couple of things we couldn’t work out on the car,” Reif said. “It had a vibration and was off pace. Just because we had some adversity tonight doesn’t mean it will continue. I think we can make up these points and win a couple of races this year.”
Start / Finish: 20 / 12
Next Race: Saturday, April 1, Irwindale Speedway, Irwindale, Calif.
How to Watch or Listen: Live on FloRacing and Tape-Delay CNBC (Sun., April 23, noon ET)
Tanner Reif:
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By Counterman
Dana Incorporated showcased its newly customized Jeep Gladiator at the recent Winter X Games Aspen 2022.
Featuring an Ultimate Dana 60 front axle and an Ultimate Dana 80 prototype rear axle, along with Spicer performance 1350 driveshafts, “this one-of-a-kind vehicle is destined to be the talk of off-road events across the country,” Dana said in a news release.
“Our friends at Expedition Vehicle Outfitters did an incredible job building this custom off-road vehicle,” said Bill Nunnery, senior director, sales and marketing, global aftermarket for Dana. “We are calling this adventure rig ‘The Ultimate Bug Out’ because it is loaded with premium-performing Dana and Spicer parts, along with other accessories to explore the wilderness for long durations of time. Having it on display will show off-road enthusiasts how Dana aftermarket performance parts enhance durability and performance, even in extremely rugged conditions.”
A unique feature of the Dana-modified Jeep Gladiator truck is that some of the body components – including a majority of the vehicle’s bed – were built using the remnants of a 19th-century steel bridge that was located in Sydney, Ohio.
To further enhance overlanding excursions, a snowmobile track system from HellTraxx will provide deep-powder winter access when the vehicle is not traversing rugged trails in the summer. Top-of-the-line upgrades such as lights, shocks and suspension are added features, and a water-filtration system, stove and tent are included for extended outdoor adventures.
“We know ‘The Ultimate Bug Out’ will be a show-stopper at off-road events,” said Nunnery. “We encourage all serious off-roaders and campers to stop by and check out this incredible vehicle and see how Dana can help them upgrade their own off-road vehicles.”
To learn more about performance products from Dana and to sign up for the newsletter, visit
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