|I have an 87 taurus 3.0L that failed high speed HC. All of the other
|emissions tested passed. It is a high mileage car mainly driven on highway.
When was the last time it had a tune up ?
EGR controls ok ?
catalytic converter still healthy ?
Does it burn any oil ?
Plugs & Wires about 4 months ago.I had put in the Bosch Platinum plugs and
it didn't seem to run any better. I think I will change plug back to
conventional ones. It doesn't have an egr and the cat must be fine by the
NOx number. It may have started using some oil but normally it only uses a
quart between oil changes. It is about due for an oil change though.
Any other thoughts?
|Any other thoughts?
Vacuum leaks ? dried out vac. line hoses ?
Didn't they have some issues with the ignition module that was bolted
to the side of the distributor back then?
That's all I can think of for the moment. I used to work on my parents
3.0 88 Taurus wagon. Those are the things that come to mind.
Try a google search ?
Platinum plugs last longer, but don't necessarily 'run' better.
Change the oil! You need to anyway. Perhaps go up in grade to a
10W40. The engine may have some blow-by from cylinder and ring wear.
In a modern engine, a qt between oil changes is a lot. A thicker oil
will resist burn-off better (in general).
Maybe even consider a 15W40 or 20W50 diesel engine oil for summer use,
if engine has a LOT of wear...for better scuff protection. I did that
on a 4.3l blazer with 200k+ miles and got several extra years of life
out of it.
Replace intake air filter, PCV valve ( PCV filter if any).
EGR...unless it indeed has none
Fuel evap system....it HAS one, may just be a charcoal canister. FYI
on my 87 Chevy, it was a charcoal canister and 3 vacuum valves. one
of the valves was bad and threw the whole HC out the window.
Find out when the lines are shortest at the E-check place. Drive the
car 30 minutes, finishing with 10+ miles highway, to be sure it is is
fully warmed up....then straight to the test. If I have to wait in
line, I pop it into park or neutral and rev it above idle to keep it
warm. (maybe 1500 rpm so as not to be TOO obnoxious).
Don Byrer KJ5KB
Radar Tech & Smilin' Commercial Pilot Guy
Glider & CFI wannabe
"I have slipped the surly bonds of earth; now if I can just land without bending
"Watch out for those doves...<smack-smack-smack-smack...>"
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