Dwell/tach meter recomendaton
#1
Dwell/tach meter recomendaton
Have an 83 H/O......just getting car roadworthy after sitting since 1988..
Wlile going 60mph,going to work the other day,,check engine light came on ,,stayed on for about 1-1/2 min,,and then went out....drove the same route home,,and it never came back on.
Threw a code of 45--Rich exhaust mixture.
checked and cleaned connector on the mixture control solenoid..
but to do the rest of the checks in the chassis serv manual,,i need to hook a dwell meter up.
Anyone have a recommendation of a good,,accurate,dwell/tach meter ?
What do you guys use ,,that would be good for my application ?
Thanks,
Erik
Wlile going 60mph,going to work the other day,,check engine light came on ,,stayed on for about 1-1/2 min,,and then went out....drove the same route home,,and it never came back on.
Threw a code of 45--Rich exhaust mixture.
checked and cleaned connector on the mixture control solenoid..
but to do the rest of the checks in the chassis serv manual,,i need to hook a dwell meter up.
Anyone have a recommendation of a good,,accurate,dwell/tach meter ?
What do you guys use ,,that would be good for my application ?
Thanks,
Erik
#2
Not sure why they say to hook up a dwell meter? That is what is used to check the dwell on a point distributor. You have a HEI system, no adjustment. I can see using the tach part of the meter. But what did they say you were to check, with the dwell meter? ? Not real clear to me.
#3
In the early computer systems the fuel is controlled by an electrical pulse. The "width" of the pulse determines how rich or lean the mixture is. A dwell meter can be used to determine the width of the pulse.
Dwell meters can still be obtained at auto supply stores, although they may have to special order them. E-Bay also probably has a good selection of new and used dwell meters.
Dwell meters can still be obtained at auto supply stores, although they may have to special order them. E-Bay also probably has a good selection of new and used dwell meters.
#5
I have an old Sears one I have had for at least 30 years. I still have it in the original box that is pretty beat up. Still works like a champ. It is probably not the same one you would get today.
#6
442Harv,,as someone mentioned above...it's used to measure the pulse of the mixture control solenoid on the carb..that gets is signal from the ecm and is changing constantly ,8-10 times per second,depending on what ecm sees to determine if the mixture needs to be richer or leaner..There is a special connector that you clip a dwell meter to right in front of the carb.
I did pick me up a nos snap on dwell/tach meter..Works great,,,but still getting a rich mixture code when driving 45-60 mph...
I did pick me up a nos snap on dwell/tach meter..Works great,,,but still getting a rich mixture code when driving 45-60 mph...
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