1989 Ford Taurus High HHO emission

WTHARPER

MEMBER
1989 FORD TAURUS
6 CYL
FWD
AUTOMATIC
170,000 MILES

Last summer this car was having cooling problems. It got very hot and I heard a "ping" at what I believe was the back of the engine and it began to run rough. Now when I start it in the morning it runs smooth but after it begins to warm it develops a miss that persists at all speeds. It will not pass Texas emissions testing due to high HHO. Any ideas? Thanks.

Wednesday, October 29th, 2008 AT 11:31 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Hi wtharper and welcome to 2carpros

The HHO is it the ( hydrocarbons HC ) below will cause it to elevate

Hydrocarbon failures mean unburned gasoline is passing through the engine and entering the exhaust. The three most common causes include ignition misfire, lean misfire and low compression (typically a burned exhaust valve). Ignition misfire can be caused by worn or fouled spark plugs, bad plug wires or a weak coil. Lean misfire results where there is too much air and not enough fuel, so check for vacuum leaks, dirty injectors or a fuel delivery problem. In addition to these, hydrocarbon failures can also be caused by oil burning due to worn valve guides, valve guide seals and/or rings

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Thursday, October 30th, 2008 AT 1:25 PM