1994 Mercury Marquis Low clicking (clacking) noise

NATHAN08T

MEMBER
1994 MERCURY MARQUIS
V8
FWD
AUTOMATIC
140,000 MILES

Well, when I accelerate I hear a very light faint clicking noise. When I hit about 35 I can feel the car shift and if I don't let off the gas for a brief moment I can hear a low clicking/clanking noise coming from the engine. I have to let off the gas for a second or else the car won't accelerate (Unless I just hammer on it). Any advice?

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,724 POSTS

Has the check engine light come on?

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Saturday, May 23rd, 2009 AT 3:23 PM

NATHAN08T

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14 POSTS

Yes, but only when the car starts to idle at above normal speeds. Sometimes it sounds like the car has knocking rods? It was ran with the oil light on for a short distance. 10 miles about

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Saturday, May 23rd, 2009 AT 7:01 PM

JACOBANDNICKOLAS

MECHANIC
109,724 POSTS

If the light comes on, there is a trouble code saved in the computer. If you take it to a nationally recognized parts store, they will scan it and let you know where the problem is coming from. Most will do it for free.

Let me know what they tell you. As far as the noise you hear, let me know what the code is. A sensor may be causing the problem.

Joe

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Saturday, May 23rd, 2009 AT 11:46 PM

NATHAN08T

MEMBER
14 POSTS

I just got back from O'Reillys, there were two tests, KOEO and KOER. The first one I did was KOEO. It gave me four error codes.

111 - System Pass

125 - Throttle lower than expected

332 EGR flow insufficient

337 - EGR valve position or exhaust pressire transcendent circuit above max voltage

The KOER gave me just one,

332 - EGR flow insufficient.

I'll look around online to see what those mean but hopefully you can give me some insight on what all this means.

Thanks in advance!

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Saturday, May 30th, 2009 AT 7:57 PM

NATHAN08T