100 mile trip, a few niggles - your opinion please/ Options

[thieuster]

After two more or less shorter runs last week and Monday evening, I took the car out for a longer trip. I started at 5:30AM and went for a 100 mile round trip to the north and back home again. Great trip! And the speed makes the car very quiet! (contradictio? no!) The noise of the engine is 'pulled' away from the cabin by the air flowing over the car. Something I'd never experienced before, driving British classics with a lumpy straight engine in front of your knees!

Overall, the car runs beautifully. Two small niggles though. (Well, what else can you expect from a car that's been stored for 17 yrs?).

First, when revving the car, it pulls great. But at the steady coast of 2200 rpm, the car tends to 'shake' a little, as if it's running a little too lean. Throttle Position Sensor or... simply a little too lean? What can I expect.

Second, the indicator relay. I was under the impression that it was located at the back of the fuse box, under the dash. But I couldn't find it there. So I turned on the ignition and used the column stalk to trace the sound of the relay... There it was, way up behind the dash, close to the back of the gauges. I couldn't reach it from the 'footwell position'. So, I'm wondering: would it be easier to remove the gauge cluster from the dash?

Funny thing is, when I pull the hazard switch, the light inside the switch blinks and 'clicks', however, there's nothing to see on the dash: no green lights. I was under the impression that both (hazard and indicator) are linked! Or has that to do with the fact that my car is a Euro Spec car?

What's your opnion / experience with the matters mentioned above?

Menno

[scott_in_nh]

Above 2000 rpm when you completely let off the throttle fuel to the engine is cut.
At 2000 rpm fuel is added again and the engine "re-starts".

You can feel it "kick in" at 2000 RPM if you start at 3000 and just let off and let the engine slow.

When you are cruising with a very light touch on the throttle you may be at a point on the TPS where the control module believes you are in the idle position and it oscillates between adding fuel and not adding fuel because of the RPM.

A slight tweak to the TPS may help, driving at a different RPM will definitely help.

Now if it happens at other RPM away from 2000, then it is a lean stumble and you probably need to turn the center screw of the MPS out in very small increments until it goes away.

[DRPHIL914]

Above 2000 rpm when you completely let off the throttle fuel to the engine is cut.
At 2000 rpm fuel is added again and the engine "re-starts".

You can feel it "kick in" at 2000 RPM if you start at 3000 and just let off and let the engine slow.

When you are cruising with a very light touch on the throttle you may be at a point on the TPS where the control module believes you are in the idle position and it oscillates between adding fuel and not adding fuel because of the RPM.

A slight tweak to the TPS may help, driving at a different RPM will definitely help.

Now if it happens at other RPM away from 2000, then it is a lean stumble and you probably need to turn the center screw of the MPS out in very small increments until it goes away.

(IMG:style_emoticons/default/agree.gif) this is what really cleared up my issue- stock setting of the mps was just too lean and my wide band meter was showing this issue that i could not i.d. before it was installed, but has since been corrected by making this very slight adjustment.