Can I check my coil pack out?

[heebeegeetee]

My '97 Mk1 1800sc has developed a misfire. I have a multi meter. Can i check the coil pack, and if so, how?

Will be away at a Lotus bash for the rest of the weekend, so i look forward to many helpful replies upon my return which i can use on Monday.

Cheers guys!

[MX-5 Lazza]

Just pull each plug one at a time, put the lead back on it then lay it back on the cam cover. Start the engine and watch to see if there is a spark. If a single plug isn't sparking then it's likely to be a problem with the plug or the leads. If it's not sparking on 2 (1&4 or 2&3) then it's likely to be the coil pack.
Don't touch the plugs or leads while the engine is running though - 18,000 volts can cause a bit of a jolt!!!

Edited by MX-5 Lazza on Sunday 24th May 22:33

[heebeegeetee]

MX-5 Lazza said:

Just pull each plug one at a time, put the lead back on it then lay it back on the cam cover. Start the engine and watch to see if there is a spark. If a single plug isn't sparking then it's likely to be a problem with the plug or the leads. If it's not sparking on 2 (1&4 or 2&3) then it's likely to be the coil pack.
Don't touch the plugs or leads while the engine is running though - 18,000 volts can cause a bit of a jolt!!!

Edited by MX-5 Lazza on Sunday 24th May 22:33

Hi, done that and all appears fine. The misfire is worst when the car has thoroughly warmed up, and i would describe it as an intermittent total misfire, causing the car to jerk rather than just lose power. I'll try the exercise again tomorrow if i can after a drive.

[MX-5 Lazza]

Is it fine at idle and when running gently but misfiring on acceleration? If so it could be the thermistor/ecu water temp sensor. We had exactly that problem with the PlanetMX5 Motorsports car.

[heebeegeetee]

Hi,

Once the engine is fully up to temp, the misfire is there intermittently but at all times/revs etc.

Is there any way of checking those items you've suggested with a multi meter?