#FuelInjector

Walt writes:

Sajeev,

I wrote to you five years ago about a frozen Ranger parking brake, and later on about the incredibly dumb idea of purchasing a vintage Mustang with a loan. Thankfully, the former resolved itself, and the latter remained a pipe dream. What I did do, however, was buy a ’14 Mustang GT with a 5.0-liter Coyote V8 and six-speed manual. It now has around 9,800 miles.

At around 3,000 miles it developed a clicking noise at idle, audible with the driver side window rolled down and a curb or jersey barrier to bounce the sound back at me. The frequency of this click increases with engine revs. Existence of this issue with the 5.0-liter Coyote is well documented on F-150 and Mustang forums alike.

TTAC commentator VolandoBajo writes:

Sajeev, my worthy and esteemed fellow Panther defender,

I acquired my ’97 Mercury Grand Marquis LS about six months ago and have enjoyed everything about it. I’m hoping to find a good source for a dual exhaust that doesn’t cost more than the book value of the car, and to convince my wife that the mileage increase will pay for the mod over time.

But my present problem is baseline fuel economy. I see repeated references to a 20 miles per gallon highway figure, but I can only manage 17 mpg at the best of times.

Adios Amigo…

Farewell to our Ford Sierra’s reasonably adequate, high compression and emissions free 2-liter Pinto motor because it’s time to visit Lima, Ohio — not Peru — with a bonus question for the truly tech-savvy among the B&B.

TTAC regular David Holzman writes:

When my scan gauge says my engine is under 99% load, and I’ve only pushed the gas pedal about halfway down, does that mean, as I suspect, that I can floor it and I’m not going to get more than a drop more power out of it?

Nitin writes:

Sanjeev,

I read your blog about the problem in BMW. I have a 2009 BMW 535i X drive with turbo. The car just ran out of warranty and has 45000 miles only. My car started having engine problems last week. First, the BMW said it needs new spark plugs as they were dirty. That cost me $740 dollars. That did not work. They said it needs new fuel injectors. That was another $2100 dollars.

Dave writes:

Hi Sajeev,

This is the second question I’ve asked on here, and while I didn’t even follow the advice I received last time and here I am again! Last time I was asking about a sporty car, and I ended up getting a 2007 Ford Ranger, 2.3L, 5 speed, with all of 35,000 miles on it. It is a regular cab with nothing extra on it, a real throw back, manual windows, no AC, a nice basic truck with nothing to go wrong right?

Wrong.

Dave writes:

Hello Sajeev,

I just bought a 2000 Saturn LW1 6 weeks ago. It has a L4 2.2 Liter engine with 200,000 miles on it. After 3 weeks out of the country I came back and started it up. Was a little rough then smoothed out. I just changed parking spots. Did this one more time. The third time starting it up it would not fire. No strange noises, just no running engine. I suspected bad ignition coil. I had just changed the spark plugs before my trip and they had about 50 miles on them. Ignition coil was fine at all four points using a ignition tester. I even put new plugs in again. Fuel rail has the specified 60 PSI. Theorizing that may the fuel injectors were shut down i tried starter spray in the air intake. The motor will not fire. A compression test with a gauge picked up at advance gave me less than 10 PSI on the two outer cylinders and about 24 on the two inner. The Haynes manual is very unhelpful and only states for compression specs. that the lowest compression cylinder value should be no less that 70% of the highest compression cylinder value.

I read on-line (http://www.saturnfans.com/forum/showthread.php?p=1781795) the same but that no cylinder should be less than 100 PSI. While cranking the engine there was some light smoke visible behind the engine above the exhaust manifold, but unable to determine the source.

My question is: are you aware of catastrophic head gasket failures on these engines? I am surprised that the engine will not fire at all even if the head gasket does have a problem. I have removed the valve cover and see that the timing chain is still there and working.

When I changed the plugs last month I applied anti-seize thread sealant to the plugs as instructed in the manual. I am now having wild imaginings that the anti-seize thread sealant got into the cylinders and impregnated the gasket and is somehow responsible for this catastrophic failure. I am going to tear into the engine tomorrow and try to replace the head gasket, because i need to get this car running again ASAP. I am being hopeful and unrealistically optimistic that I cold get some input/ thoughts from you before morning when I start this laborious task…

Ideas?

TTAC Commentator jkross22 writes:

Sajeev, I’ve got a question for you. I took my car in for a warranty covered service (oil and brake fluid change) and the dealer suggests I have a fuel injection service done along with an alignment. The FI service is $260 and the alignment is $290. I’m driving an ’07 3-series wagon.

I can’t imagine why they would recommend an FI service other than to help pad dealer profit, and the alignment cost at the dealer is literally double what Firestone charges for the same thing. There is no drivability problem, but this is the 2nd time this dealer has tried to sell me on this FI service.

They have posters of it in their cubicles to ‘educate’ the unwashed masses about the dangers of dirty fuel injectors. It’s actually pretty funny. What gives on the FI service and is this something that is actually needed… ever?