bad coil?

[Lucasfree]

i made a post earlier about my 90 rr not starting.. i cleaned all earth grounds, has a new distributor and amplifier,tps, has fuel pressure,cleaned air idle sensor on intake, cleaned terminals on coil and it went from not wanting to start to almost wanting to start. it is the original coil on the rr so maybe it is faulty. which leads me to my question if a coil goes bad does it quit making spark alltogether or can it make not enough spark?. now the guy i got this thing from had the new distributor and amp module and tps he said it ran when he parked it but it was starting to had sluggish performance when under a load he parked it for 2 years and i trailered it home.

[OkieRover]

The bad coil can have a spark, but it could be a weak one.
When I replaced my coil the spark was quite a bit better. And my RR would almost start just like yours when I had the dead coil in it.

I would replace that coil. They you'd have a completely new ignition system.

[Landy-Andy]

On the coil there is the two small wires, have you checked these out?
Follow them from the coil to their other ends, check for breaks, burns, bad or loose connections. Also is there any reason these could of been disconnected & reconnected the wrong way around (the coil has a + and - side)?
Worth a look..
Andy

[Lucasfree]

thanks for the imput, heres what i changed today i put in new plugs and gapped them .36 and a new coil, the engine is even closer to running then ever ,it will run at about 100 rmp for about 5 seconds then die plugs are very wet with fuel and still starting fluid wont start it so that pretty much tells me it cant be a fuel issue it has to be a bad ignition amp module!!! though it was supposedly a new one maybe they put a used one in, but if it that then i mine as well put a davis unified ignition distibutor in it and not have to worry about this anymore just everything else what do you think,

[james.carsner]

Originally Posted by Lucasfree

it will run at about 100 rmp for about 5 seconds then die plugs are very wet with fuel and still starting fluid wont start it so that pretty much tells me it cant be a fuel issue it has to be a bad ignition amp module!!!

Two questions:

(1) What if the injectors aren't atomizing the fuel, but just streaming fuel into the cylinder?
(2) I know this is far fetched, but have you cleaned the battery terminals?

Past Automotive Experience Observations:
- Had a Toyota and wife couldn't figure out why she couldn't keep it running while I was on deployment, I cleaned the battery terminals, and no problems until it was stolen last month.
- Buddy of mine had a bad Bosch Coil on his '76 BMW 2002 and it provided very little then no spark.

Waiting for the metric and SAE wrenches to start flying...

[OkieRover]

audible grown..........
I can't spare any wrenches to throw!!! I have metric and sae bolts and nuts on my Rover.
So I'll throw the old plugs I have in a box from my last plug exchange.

[james.carsner]

Originally Posted by OkieRover

So I'll throw the old plugs I have in a box from my last plug exchange.

Only if they are gapped at an 1/8th of an inch.

Lucasfree,
How goes the trouble shooting? Was it the amp?

[Lucasfree]

well just got it started dunno what it was but i unplugged the tps, and removed the potentiometer and had a friend plug the hole with his hand and had the MAF senson seperated from the plenum and bammo!!! fired up plugged everything back in and let it warm up but still has a problem idleing. it first would stay at about 3000rpm but now will die it i dont work the throttle. so the conclusion is it runs but idles rough, got a borg warner p39 out of a buick grand national 75- 85psi 26-30gph and a new fuel filter and a DUI distributor (HEI) coming in the mail so i hope that will will take care of my idleing problem!!! so needless to say ill be putting a brandnew rover distibutor ignition amp and coil on ebay!!!