Every once in a while one of the spark plugs falls out and I have to
put it back in, but other than that the idle seems to be fine. I’m
not sure what misfiring is but I assume to someone like myself it
would just run "rough". Occasionally, it does, then I restart it
and it’s fine.
The mechanic is " aircare certified" which means he has a gas
analyzer and a relatively good record for repairs relating to aircare.
He said the EGR and system is fine, although on the invoice it says
he repaired vacume leak. Apparently he cleaned out the "ports" that
can build up causing high NOx emissions. The only explanation I got
was everything else works the way it’s supposed to so my cat converter
I don’t think he’s neccesarily wrong, the head gasket went on my van
prior to me purchasing it, a new engine was put in...I’ve replaced two
transmissions...a radiator...a couple batteries, an alternator, the
berring on the front right 2 or 3 times now...
I’ve owned this car for 3-4 years.
I am frequently asked if my engine light is on, it’s not. For the
most part the vehicle seems to run relatively smooth. My dash lights
are out, not sure if it’s electrical or just the bulbs, and frankly I
don’t have the money for a technician to figure it out.
I have bad luck with mechanics, they always try to scam me...it’s
really quite frusterating, I may not know about vehicles but I’m not
stupid. I did a little checking around for parts and I can get a ford
cat converter locally for $500. The mechanic wanted $628 for his,
tried telling me that his distributor is giving him a discount on this
price...which is BS because I called the same person he did and
without a discount on the part is $500 and some change.
If it will help...here are the numbers. I did two tests...
HC (g/km), max allowed 0.5000, vehicle reading 0.3193, avg pass 0.0873
CO (g/km), max allowed 8.0800, vehicle reading 2.8459, avg pass 1.9758
NOx (g/km) Max allowed 1.1200, vehicle reading 1.4698, avg pass 0.6229
I was advised to put fuel injecrot cleaner into my tank and premium
fuel, then drive to heat up the cat...drove for over an hour
HC (g/km), Max allowed 0.5000, vehicle reading 0.2357, avg pass
CO (g/km), Max allowed 8.0800, vehicle reading 2.3989, avg pass 1.9758
NOx (g/km), Max allowed 1.1200, vehicle reading 1.6969, avg pass
"Jim Warman" wrote:
> As odd as it may sound, customers are, all to often, the cause
> of wasted
> time (and therefore expense) because they tend to leave things
> out. (I have
> no idea if they are hoping for a cheaper invoice by minimizing
> the concern,
> but it sounds plausible). The tech can get into a diagnosis
> that starts with
> some extreme basics only to discover that there is "something"
> the owner
> hasn't mentioned. If we ask why they didn't say the car had
> done <this> or
> does <that> too, the reply is usually "I didn't think it
> mattered". And this
> happens nearly every day and even several times in one day...
> It isn't the
> tech deciding how much a repair is going to cost, it is the
> car. The tech is
> simply the messenger.
> FWIW, an engine misfire is going to have a greater effect on
> HC and CO
> production than it will on NOx production.
> Any condition that can drive combustion temps up, will
> increase NOx
> production. However, misfires can destroy the converter... The
> meltdown may or may not restrict the exhaust flow.
> For the original poster... While I am not familiar with
> "universal" type
> catalytic converters, these "fits all" devices aren't
> accurately sized for
> any particuaar applications (neither physically nor in their
> ability to deal
> with exhaust flow and/or byproducts). I've often seen owners
> treated to
> added expense because the less costly alternative didn't quite
> make the
> grade (I think you'll find that these aftermarket suppliers
> will only offer
> a "replacement" warranty rather than a money back warranty).
> BEFORE the cat is replaced, it is crucial that the EGR
> (exhaust gas
> recirculation) system be thoroughly tested to ensure that it
> is functioning
> as required. Depending on the engine in your Windstar, it may
> have a "ported
> EGR" type system. These small passages can become plugged with
> robbing some cylinders of EGR flow and causing higher than
> normal NOx
> numbers. Extreme cases can result in a car that has a rough
> idle concern or
> even a stumble on acceleration but it can often go un-noticed,
> as well. It
> can take a fairly talented tech to accurately diagnose this
> > Gee, you'd think she would have mentioned the rough running
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