missfire

[s1ghthound01]

Hi guys, just rescued a nice little M100 from falling to bits in a shed.
Two previous owners and only 42 thousand miles on the clock. She has been stuck there for over six years now. Anyway, got her home after having to drag her out, all four wheels seized. Freed off the fronts and removed the rear calipers to get her rolling. She is now on my drive. I have managed to get her started with a snuff of magic spray but she is missing on No's 1 and 2 cylinders, plenty of spark at the leads and the plugs. I am more old school mechanics and not up too speed with electronics but I know the engine management light is not coming on, so showing no faults. Any suggestions. I thought of moving the leads from No3 injector to No2 to see if it then fires. I need to get her running properly to clear my drive, if nothing else. Then I want to do a proper restoration on her as I think they are cracking little cars. My usual Lotus drives are S3 Esprit's of Excel's, although I already have an M 100 turbo which has been tuned to death and is the daily driver for my wife.
Any suggestions greatly appreciated.

Thanks in advance.

John.

[Rambo]

Hi John. Why not try using the leads from Wendy's car ??

Another thought. Do you have Elanscan ? If not, I'm not sure how far you are away from JohnW (John Wham) who you have met a few times before. He is a bit of an Elanscan guru who may, or may not, be able to help you out locally and come up with some good ideas

[s1ghthound01]

Hi Rambo. Cant see the issue being the leads as I have had color tune units on all four leads and she is giving good, nice strong spark, same goes for the plugs. I have also swapped plugs over just too double check and all for are fine. I have used the paperclip check through the system and nothing shows up on fault. Must also add the dash light is not on showing any fault. As for scan, I haven't a clue on that one and John is a good bit from me and I cant get the car in for him to check it for me. My next thought was to swap over the injectors and see if that changes the position of the none firing cylinders. The petrol has been drained of it's 6+ year old fuel and fresh put in the tank along with some STP injector cleaner. I now need to find out how to remove the injectors so that I can attempt the swap. Then if required try and source a couple of replacements.

Cheers.

John.

[s1ghthound01]

Pointers required. Did everything to remove the injectors yesterday and got as far as removing the fuel rail and turning the little clips on the top as advised on a previous post but could not get the injectors detached from the fuel rail, didnt want to force them in case of damage. What am I doing wrong guys. Need to get this thing running. Secondly, there are a couple of second hand injectors on ebay at the moment. Would they be a safe bet to get her going on all four cylinders.

Thanks guys.

[lotustonybassplayer]

I recently changed mine it's only the o seal holding it in the rail, I just turned them a little to break the seal maybe spray some lubricant they did pull out ok hope this helps.

[Danevansgolf]

Hi everyone.
I have just finished doing the injectors. Pig of a job!!!!! Taking them out of v hard. They eventually pop out, a lot of gentle prying!n( I sent them away to be cleaned and refurbished £68.00 for all 4) Once I re fitted everything, the car sounded like a tractor, no leaks. I took it all apart again and wiggled the injectors a bit more, they seemed to go in to the plenum about 2mm more, which seemed to cure the tractor noise. Fingers crossed, car on test drive later today, maybe. Just bought some s2000 seats so may start that project.. Good luck

[s1ghthound01]

Got to ask, how did you sepperate the injectors from the rail. What I read says, turn the clips from left to right then gently pull off the rail. I tried that yesterday with no success. Any pointer would be great as I dont want to force them.

Thanks.

[s1ghthound01]

Thanks guys, got them all out. Went to refit and dropped two of the clips down the little space in the middle of the inlet manifold, and now cant get at the little beggers. Anyway, I need two replacement injectors complete with retaining clips. Can anyone help get this little barn find rescue project going again.
Anyone with a couple of spares please email me and let me know your price etc so I can get this done.

Thanks guy's.

John.

[alan e]

I recommend that you change the cam belt and water pump if it's been standing for 6 years

[s1ghthound01]

Hi Alan, cambelt and pump on the list of must do job's. Just want to get her running on all four cylinder first. Had a wee bonus today, managed to pick up a brand new set of rear calipers for under £300 complete with pads. Good result. Now just need two injectors.

John.

[Andy_J]

Probably a little late to say this but you can check if the injectors are firing, by switching the ignition on (but don't start the engine) and then manually open/rotate the throttle, in the engine bay. You will hear each injector fire as you open the throttle

[s1ghthound01]

Hi Andy J. Yes was told about that one the other day so did the stethoscope test and you can hear each injector give of a couple of cracks when the accelerator is pressed with the ignition of but car not running. So today after speaking with Phil at SE lotus center I once again removed the injectors but left them hooked up tot he fuel rail and once again turned on the ignition. After getting a face full of fuel the first time, I carried out the same procedure again and found that only two injectors are actually passing fuel. So now I guess it is the injectors that are at fault. Also found a couple of leaking O rings which I am now trying to find local replacements for, well all 8 if I can get them. Net stage is to find a couple of injectors. SJ prices are sky high. Anyone got a couple of spares for sale so that I can at least get her running before going any further with her. One bonus yesterday was the brake caliper I found online arrived, brand new, never fitted and came with a set of EBC pads. So, if I fit the calipers and fix the brakes, I obviously will want to try her out. It's your duty.

[Brit-Car-Nut]

Unfortunately, the Injectors are unique to the Isuzu Turbo engine.
Maybe someone has a couple of used ones they can loan you?

The O-Rings are fairly common and can be found using the following reference:

Injector-O-Rings.jpg

[Simon_P]

Injectors fire in pairs and fire every stroke.

So most likely you have one dud with a short which will short the pair. Check the resistance of each and unplug one while testing the other.

If both still appear dud, suspect the circuit and test with a known good injector.

Also a faulty injector won't trigger the CEL. And you can check everything else as the engine will run on 3.

SJ are I presume selling genuine injectors at the genuine price.

[Simon_P]

The O-Rings are fairly common and can be found using the following reference

Oh if it were that simple..... This side of the pond we don't have the likes of NAPA, Jegs, Rock. We have Halfords, who sell bikes and polish. Asking for injector "O" rings would be like asking for a flux capacitor for one's time machine.

[Brit-Car-Nut]

The O-Rings are fairly common and can be found using the following reference

Oh if it were that simple..... This side of the pond we don't have the likes of NAPA, Jegs, Rock. We have Halfords, who sell bikes and polish. Asking for injector "O" rings would be like asking for a flux capacitor for one's time machine.

But I assume there are factory car dealers in every area?

He should be able to visit a local Audi, BMW or Jag dealer and get them to match up a set, no?

Are there no "performance" tuners around? They must change injectors...

Rock Auto UK lists the o-rings:

BECK/ARNLEY 1580892 {#1580291, 166185L310} Kit : £1.07

GB REMANUFACTURING 8008 Fuel Injector Seal Kit Services one injector, includes top & bottom seals. £1.24

Lotus Part # A100E6575S is a set of 8 o-rings, Dealer sell price is £9.13

There really are multiple options, even in the UK.

[Simon_P]

John, you take my response far too seriously - Yes of course there are options
Dealer set is going to cost £16 delivered for 8 Orings! or £180 for an injector so yes everything is possible.

He should be able to visit a local Audi, BMW or Jag dealer and get them to match up a set, no?

The first question they will ask is what vehicle it is for...... then part number....... then no sorry sir - We don't have customer service in the same way you do you would need to know exact model/year.

Rock Auto UK lists the o-rings:

Rock Auto UK is a warehouse in the US.

It is just expensive or difficult here rather than impossible - That's why many of us buy stuff in the US and are prepared to wait 2 weeks.

Have a go yourself - Major parts supplier
http://www.eurocarparts.com/

Motorsport
http://www.demon-tweeks.co.uk/

[s1ghthound01]

On advice of all you guys, I have sourced a supplier in the states whom have a complete NEW set of injectors as per OEM, same specs, fuel rate, ohms etc. After discussing my urgency, they have shipped them out this morning complete with a spare set of O rings at no additional charge. Apparently they are Delphi who took over from RP and are factory surplus stock. The injectors have been tested and match flowed prior to dispatch so hopefully all will be well. Purchase price, shipping, customs duty, all in for $226.00, cant be bad. The guy even took the time to call me this afternoon to explain how best to flush the fuel rail etc to ensure I get no loose crud blocking up the system and fouling the new injectors. Now just too wait for Mr postman.

[HJ2]

The O-Rings are fairly common and can be found using the following reference

Oh if it were that simple..... This side of the pond we don't have the likes of NAPA, Jegs, Rock. We have Halfords, who sell bikes and polish. Asking for injector "O" rings would be like asking for a flux capacitor for one's time machine.

How very true this, also here in the Netherlands!

[s1ghthound01]

Well patiently waiting on parts as they are on their way from the states, so while waiting I have started on the brakes and a little tidy up. rear offside caliper and pads fitted, front offside disc cleaned up as it was like new, only slightly corroded with surface rust and new pads fitted. While the wheels were off I thought I would give them a paint. They had no chips or kerbing, just a horrible Grey metallic color so a quick clean with wonder wheels, a rub down and a couple of coats of paint. I even took the time to paint in the Yellow Lotus name back on the rims, so looking far better. Only downside is Mrs W now wants the same on her little (Avatar pic) Blue M100. Also gave the interior a clean up and it looks good with no splits on the seats. Well chuffed so far.
Tried uploading some photographs, but for some reason it's just not happening. oop's, I Lied. Ah well, will get it right sometime.

As found, just loaded.

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