weak spark 1990 rangrover - Land Rover Forums : Land Rover and Range Rover Forum
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post #1 of 2 (permalink) Old 09-25-2004, 09:16 PM Thread Starter
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Cool weak spark 1990 rangrover

I have a weak red spark at the plugs i replaced the coil wires cap and rotor
still runs ruff pore performence im old school points not electronic type its
getting 13volts to the coil when i short +and - across the coil i get about
3 volts is that rite? i tryed it on my 1987 i only got less than i volt when i
shorted it across the +and- help clueless i am tell me what to look fore
i make my living rebuilding heavy equment transmissions but electronic
ignition no clue. help!! wick is my name
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post #2 of 2 (permalink) Old 09-26-2004, 07:25 PM
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If I posted " Have 1991 RR with transmission problem and have changed fluid and filter" what would you think ? (No, I don't need answer.) Would it not be helpful to describe the current conditions and thiose leading up to occurance, as well as, observations such as fluid color, odor, or presence of metalic flakes ? <I did notice end of axil hanging down on ground...>

How do you know you have ignition problem ?

There are five areas I can think of that could be considered. Air, fuel, spark, exhaust, and control/measure.

Air: filter, leaks, valves not working (EGR), idle stepper motor
Fuel: injectors, fuel pressure, pump, filter
Spark: I think you almost nailed this section (you did not replace distributor, worn shaft or bad detector could be issue.) You never said anything about the condition of the plugs such as color and gap/mileage.
Exhaust: unlikely, (is catalytic converter dead causing restricting ?)
Control/measure: Need to scan codes on ECU.

My guess, based on nothing, is Air.

Analyze first...replace parts last.

That's all for now....Glenn 1991 RR with 169K miles.

Last edited by glenncof; 09-26-2004 at 08:10 PM.
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