Running rough after a rebuild - includes video

[moscoworbust]

Hi,

I rebuilt the top end of my mr2 and painted all the bits, added a new intercooler, downpipe and exhaust.

I also put in new spark plugs, new oil filter, new fuel filter, new rotor arm and cap.

I started it up and it sounded fine for a few seconds then died, now it starts and sounds horrible... see video.

The spark plugs are wet and have a black ness to them... i cleaned them and took one out after only doing this video and they were wet again.



I also took the whole thing apart and redid all the jubilee's etc to make sure there is no air gap.

you can see the video here:

http://www.youtube.com/watch?v=pjTOY1no_vM

It was running fine before I did this, except an overheating issue which was the thermostat.. I put a new one in.

It runs... just don't know what the hell is causing the issue.

I'm thinking about taking the fuel rail off, but the fact it is wet means it must be getting enough fuel.

Also, all the spark plugs are wet so it's not like the head gasket has gone as 1 would be worse.

I'm open to ideas.

[rev3turbo]

well if all the spark plugs are wet with fuel then each cylinder is getting fuel. To me it means that the fuel isnt burning properly, ie: spark related.

id pull the efi fuse and pull each plug out one by one and check for a spark on each one

are the HT's on properly, the rotor arm fitted correctly?

if not it could be something coincidental such as the coil pack on its last legs

it could also be a bad batch of new spark plugs, id try the old ones to eliminate (ive had that before)

[moscoworbust]

Makes sense.

I assume so.

I made sure I didn't put them on the wrong way, doing 1 by 1 etc...

Maybe I did.

Need to find a pic of which cap port goes to which cylinder so I can check.

I'll get a pic, re do the rotor arm and check spark.

Where is the EFI fuse?

[Steve-O 2007]

-correct spark plug gap?
-Leads in the correct order?
-When you say rebuilt the top end did you have the head off? If so Cambelt all lined up and head torqued down properly?
-Did you paint the head cam cover? If so you didnt shot blast the old paint off did you?

[moscoworbust]

-correct spark plug gap?
-Leads in the correct order?
-When you say rebuilt the top end did you have the head off? If so Cambelt all lined up and head torqued down properly?
-Did you paint the head cam cover? If so you didnt shot blast the old paint off did you?

-correct spark plug gap? yes, i did this

-Leads in the correct order? gonna check now

-When you say rebuilt the top end did you have the head off? If so Cambelt all lined up and head torqued down properly? No, i din't touch the head

-Did you paint the head cam cover? If so you didnt shot blast the old paint off did you? Didn't shot blast, just a rub down and rattle can respray

[rev3turbo]

just to clarify

cylinder 1 is nearest the cambelt end, cylinder 4 nearest the gearbox . have you put the leads on the wrong way, counting left to right - 1-4

[alanmr2turbo]

im going with spark plug leads in wrong order

[moscoworbust]

just to clarify

cylinder 1 is nearest the cambelt end, cylinder 4 nearest the gearbox . have you put the leads on the wrong way, counting left to right - 1-4

I just checked against 4-5 photos..

Going clockwise from top left on the cap...

1-2-4-3 (using your method of 1-4 as right to left)

4-3-1-2 if you count the cylinders left to right.

Strage thing is the cap has markings on it 1-4 that don't add up with the correct order. Bit odd that. I tried it anyway and it didn't fire at all.

[moscoworbust]

This is the cap I bought:

http://www.mr2-ben.co.uk/products/view/ ... 989-121991

[moscoworbust]

wait a minute... the cap has markings on it.. but i assumed it was 1-4, lwft to right. Maybe if I follow the markings on the cap but go 1-4, right to left it may work.

I'll try after I finished this sandwich.

1-4 right to left, bit odd.

[rev3turbo]

its 1 to 4 right to left because essentially you are looking at the engine from behind (mid engined car)

if you was to look at the same engine in a front engined car, celica... it would be 1-4 left to right.

[alanmr2turbo]

my cap has the 1-2-3-4 markings and spark plug 1 goes to No1 and so on.

[moscoworbust]

its 1 to 4 right to left because essentially you are looking at the engine from behind (mid engined car)

if you was to look at the same engine in a front engined car, celica... it would be 1-4 left to right.

ah yeah... makes sense.

Refuelling completed... I'm heading back out.

[moscoworbust]

Well, I'm certain HT leads in the right order.

Following 1-4, right toi left, they even match up with the marks on the cap.

I pulled each plug and there is a spark. It's pretty weak though, very weak. It's orange, not a shard blue spark.

Maybe the gaps are too small?

[moscoworbust]

I fitted NGK 6097's ( as recommened by several websites)

And gappped them to 0.028".

I guess it's the coil pack or HT leads.

[adam1989]

Hi,

Do you have an afm?

Have you unplugged that for any reason?

Mine over fuelled badly when it broke and sounded just like that, easy way to find out if it, just unplug it while the car is running.

Adam

[moscoworbust]

yes it's a rev 1.

I didn't touch it.

I guess I can try.

You mean pull out the connector?

note. coil pack is a pain to get out. I think there is a bolt each side. but can't get a spanner or socket on either.

[adam1989]

Hi,
Yeah just pull it out, mine was seriously over fuelling and sounded just like yours, unplugged the afm and ran fine, luckily I had a spare one to fit.

Ran perfect again after fitting it.

Adam

[moscoworbust]

Hi,
Yeah just pull it out, mine was seriously over fuelling and sounded just like yours, unplugged the afm and ran fine, luckily I had a spare one to fit.

Ran perfect again after fitting it.

Adam

ok cheers.

I'll try it tomorrow with more light.

Not sure how the AFM would of broken during all this though.

Still doesn't cover my weak spark issue.

[Steve-O 2007]

I fitted NGK 6097's

NGK BKR7E is what you want is that the same as 6097??