The Truth About Cars » spark plugs http://www.thetruthaboutcars.com The Truth About Cars is dedicated to providing candid, unbiased automobile reviews and the latest in auto industry news. Tue, 21 Oct 2014 14:00:13 +0000 en-US hourly 1 http://wordpress.org/?v=4.0 The Truth About Cars is dedicated to providing candid, unbiased automobile reviews and the latest in auto industry news. The Truth About Cars no The Truth About Cars editors@ttac.com editors@ttac.com (The Truth About Cars) 2006-2009 The Truth About Cars The Truth About Cars is dedicated to providing candid, unbiased automobile reviews and the latest in auto industry news. The Truth About Cars » spark plugs http://www.thetruthaboutcars.com/wp-content/themes/ttac-theme/images/logo.gif http://www.thetruthaboutcars.com Piston Slap: A Rather Thirsty Escort? http://www.thetruthaboutcars.com/2014/07/piston-slap-a-rather-thirsty-escort/ http://www.thetruthaboutcars.com/2014/07/piston-slap-a-rather-thirsty-escort/#comments Mon, 28 Jul 2014 12:01:32 +0000 http://www.thetruthaboutcars.com/?p=873833 TTAC Commentator Weltron writes: Hi Sajeev! The car I am writing about today is my winter beater, which is a 1999 Ford Escort SE sedan which says it has a tick over 155,000 miles. (Pictured above) The problem I’m having with it is it it getting dreadful gas mileage. My average tank is about 19 […]

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TTAC Commentator Weltron writes:

Hi Sajeev!

The car I am writing about today is my winter beater, which is a 1999 Ford Escort SE sedan which says it has a tick over 155,000 miles. (Pictured above) The problem I’m having with it is it it getting dreadful gas mileage. My average tank is about 19 miles to the gallon (in comparison that is what my twin turbo straight six Volvo gets around town). Over the winter I replaced both of the o2 sensors and got a marginal improvement (about .4 mpg).

And here’s the kicker: the dumb thing runs perfectly. No error codes or anything. Idles smooth and everything (well as far as Escort refinement goes). When I go on the highway (which is fairly often) I can see upward of 21… If I’m lucky.

Help please! I’m debating on whether to sell it or not due to this gas mileage problem for something bigger (thinking an Oldsmobile Eighty Eight/LSS or if I’m feeling lucky … an Aurora if I do end up replacing the Escort.) Thank you in advance for your help.

P.S. Here’s a list of what has been replaced/cleaned since the fall.

Mass air flow sensor cleaned
New air filter
New spark plugs/ plug wires
New o2 sensors (both upstream and downstream)
New muffler
New tires

Sajeev answers:

It’s funny how well-maintained vehicles occasionally have an obvious problem that’s impossible to diagnose.  But going to the beautiful, enjoyable yet expensive and complicated Northstar powered Oldsmobile is the wrong move!

You’ve done the basics, kudos to you.  That makes our job easier. Considering your Volvo drives in the same manner (presumably) there’s certainly a minor problem outside of driver error. And I wouldn’t be so adamant if it didn’t happen to me:

Try changing the fuel filter first, then get new/reconditioned fuel injectors.

That’s it.  I know you’ve slooooowly been losing power and efficiency.  Perhaps you notice a mysterious fuel smell?  The injectors are no longer turning on/shutting off correctly. And when you get ‘em installed, ZOMG SON, note the instant acceleration improvement and the later MPG lift.

So go ahead and keep it, even if the cylinder head might be a problem in the future.

Send your queries to sajeev@thetruthaboutcars.com. Spare no details and ask for a speedy resolution if you’re in a hurry…but be realistic, and use your make/model specific forums instead of TTAC for more timely advice. 

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Piston Slap: 100,000 Mile Tune Ups, Dex-Cool, Grandma’s S.L.A.B. http://www.thetruthaboutcars.com/2013/02/piston-slap-100000-mile-tune-ups-dex-cool-grandmas-s-l-a-b/ http://www.thetruthaboutcars.com/2013/02/piston-slap-100000-mile-tune-ups-dex-cool-grandmas-s-l-a-b/#comments Mon, 11 Feb 2013 12:52:26 +0000 http://www.thetruthaboutcars.com/?p=477112 Justin writes: Sajeev, I have a 2001 Buick Regal LS. I bought it in 2007 with 14,000 miles on (yes, from a grandmother). It has 72,000 miles on it as of this morning. It’s not a great car and has required plenty of maintenance (for example, I’ve had to replace the brakes completely 3 times […]

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Justin writes:

Sajeev,

I have a 2001 Buick Regal LS. I bought it in 2007 with 14,000 miles on (yes, from a grandmother). It has 72,000 miles on it as of this morning. It’s not a great car and has required plenty of maintenance (for example, I’ve had to replace the brakes completely 3 times already). However, I have a few questions about long term items:

1. Spark plugs. Should I change them? The owner’s manual specifies 100,000 miles; does time play a factor in that at all? I’ve read that sometimes the back 3 never get changed anyway (apparently it’s a PITA).

2. Coolant. I had it changed once in 2008 (it’s Dexcool) because I had been reading the horror stories. How often should I be changing this?

I’m unsure how long this car is going to last, but I’ll keep limping it along until the cost gets too high. So cost is a factor here too.

Thanks!

Sajeev answers:

As you learned, buying a low mile original car isn’t necessarily a great idea. Unless you buy it for an occasional, collector type of vehicle. (*cough* H-town swanga *cough*) Though a 6-year-old car with low miles doesn’t exactly fit this definition: you replaced the brakes three times in the past 58,000 miles?  Whaaaa?

 

Either you got screwed by a mechanic or you are a seriously aggressive driver that needs elbows and vogues to slow yourself down.  Perhaps you should take a page from the Houston playbook, and keep that GM sedan Slow Loud And Bangin’.  But I digress…

  • Spark plugs: the 100,000 mile tune-up interval has been proven valid for every car I’ve seen, mostly because platinum plugs are that great. There’s a chance that age hasn’t been kind to the ceramic part of the plugs, but if the car idles smooth when cold, gets good mileage, decent power, no check engine light, etc…don’t worry about it.
  • Previously discussed here, here and here, Dex-Cool is a bizarre case where you can either flush it out (entirely, no margin for error) and switch to another type of coolant, or continue topping off with a Dex-cool compatible coolant, or you can continue to use Dex-Cool and service it as per the owner’s manual.  If you choose the latter, I’d service a little more regularly than suggested…out of fear of the Dex-Cool devil that comes from neglect.

Send your queries to sajeev@thetruthaboutcars.com. Spare no details and ask for a speedy resolution if you’re in a hurry.

 

 

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