Holding back/ missfire and flashing EML under load

does this help?
www.rhinopower.org/diag/cel.html

Hi
Have you had any luck? I'm experiencing the exact same problem with my 2001 soft top Jimny with a G13BB engine. Got codes 31 and 32 from the OBD.

Took it into the dealership and typically on the test drive the CEL didn't show up and when they used their own OBD there was no code, they're saying the previous guy must have cleared the memory.

But of course on the drive home the CEL came on and the lack of power that accompanies with it. I need to lift my foot off the accelerator slightly for it to go out and power to come back. But then almost straight away it comes back on again. Seems to be worse when going uphill and after a long drive/driving around all day.

I'm hoping you've found a solution!

cheers

I tried swapping the MAP sensor from a mate's car and still had the same problem. Didn't disconnect the negative before swapping, would this be an issue? I didn't realise you had to.

map sensor could be a possibility lagunas do much the same when there half buggered

also could be a mass air flow sensor or egr valve if fitted?to jimnys ?

what might be a good try (works with citreon c3's ) simply disconnect battery for half an hour and reconnect



hope this helps just thinking aloud without seeing the car

Hi guys,

What you have here is quite a simple fault, You have unknowingly made it more complicated.

You have either a plug or HT/coil breaking down under load, I have seen this so many times on many different types of vehicles.

If you could read the DTC's it would be easier and indicate a code like PO301 (Cylinder number 1 miss-fire) for example, that would lead you straight to the correct faulty cylinder

Since you can communicate with the ECU it will have to be process of elimination, id change the plugs first even if they are not that old, I have fitted brand new plugs which have given this symptom before, if that fails, set of leads,of if you have coils, you can either buy a new set or just bu one, fit it to number 1 cylinder and try it, if it doesn't cure it move it to number 2 cylinder etc, until you cure the problem resulting in that cylinder being faulty.

Mass air flow sensors and MAP sensors don't really cause miss fires or premature detention witch is what is happening when the MIL light FLASHES, they do and can cause poor performance, idle issues and starting problems.

Steve.

Result! According to the mechanic i saw today, the engine wasn't misfiring. He still thought it must be the MAP sensor and recommended I leave it for a day for them to run tests. Anyway, I mentioned some of the suggestions i gained from this website and others and that got him thinking at least, they sometimes need a nudge these guys.

We disconnected the tube that runs from the filter/non return valve (orange box) to the MAP sensor on the sensor end and ran the engine for a couple of minutes, then shut down and replaced it. Problem solved. The tube must have been partially blocked. I saw somewhere that someone else did the same thing which solved the problem.

Hope this helps!

Cheers