I've done a few jobs on the zed including; replacing 4 of the old injector connectors (they were just spade ends pushed on the injectors!!) with new Nissan ones, swapped the balance bar for a chrome one, replaced the seals on the BMC and changed the CC unit in the engine bay for a much cleaner one.

 

The problem I'm having is that the engine is vibrating the whole car really badly now and is idling very rough, almost cutting out.

 

I've checked the MAF that was fine, the connectors I changed were soldered on and checked. I've cleaned all the connectors with contact spray.

 

I did have a split pipe on the back of the balance bar, which when I pulled it off the car wouldn't start. I thought that this was the problem, but I've changed the pipe for a good one and it's just as bad :no:

 

Could this be a boost leak problem or caused by a problem with the connectors I changed?

 

Car was running fine before I did the work :death:

 

Help me as I'm really stuck on this one.

Did you use new O rings for the balance bar, also sounds like a misfire so something isn't firing correctly, have you tried the long screw driver trick?

 

Put a long screw driver directly on the injector cap with the car running and then put your ear to it, you should hear a series of clicks, if the injector is firing.

 

Also, to find out what cylinder is misfiring, with engine running, pull the plugs off of the Coil packs one at a time and listen for engine change. if it cuts out its the wrong plug, put it back on restart the car and try another one, if there is no change then that's the cylinder its not firing on. Check the Coil pack plugs as well, they contain a black grommet, if its not seated correctly (just push it into the plug housing use a small flat head screw driver until it reaches the bottom end of the plug) then plug them back in and see if that works. if all was fine before you started, my guess is either a Major Air Leak somewhere. or a miss seated plug. just carefully go over everything you have just changed and check all pipes and connections.

Did you use new O rings for the balance bar, also sounds like a misfire so something isn't firing correctly, have you tried the long screw driver trick?

 

Put a long screw driver directly on the injector cap with the car running and then put your ear to it, you should hear a series of clicks, if the injector is firing.

 

Also, to find out what cylinder is misfiring, with engine running, pull the plugs off of the Coil packs one at a time and listen for engine change. if it cuts out its the wrong plug, put it back on restart the car and try another one, if there is no change then that's the cylinder its not firing on. Check the Coil pack plugs as well, they contain a black grommet, if its not seated correctly (just push it into the plug housing use a small flat head screw driver until it reaches the bottom end of the plug) then plug them back in and see if that works. if all was fine before you started, my guess is either a Major Air Leak somewhere. or a miss seated plug. just carefully go over everything you have just changed and check all pipes and connections.

 

Cheers mate, I'll give that a go. I did change the balance bar O rings for new.

Cheers mate, I'll give that a go. I did change the balance bar O rings for new.

 

Have a good poke around something isn't right, let us know if you solved it, if not, id say time to check those soldered connections matey.

I'll try and get out and check it over tomorrow rain permitting, then report back my findings.

Bit of an update.

 

I did the screwdriver test and all 6 injectors are clicking like an African tribe. I found a mashed coil connector which I disconnected, the engine ran exactly the same as when plugged in. So I'm thinking that I've somehow disturbed this knacked coil connector when doing the injectors and it's now fallen apart so much that it's given up the ghost.

I'll get hold of a another coil connector and see if this cures it.

Another Update:

 

Replaced coil connector, no change so I replaced the whole coil. The engine is running better now but is still not right.

 

I ran a conzult cylinder test and it's saying that Cylinder No 1 is showing a drop of -12rpm and is highlighted in red:thumbdown:. The other 5 are in the green and passed (dodgy coil was on cylinder 4). ECU is giving code 55 so no problem there.

 

So, I guess that there is a problem with cylinder 1:hammer:. I'm not really that good at engines so I don't know what's causing this:confused1:. As mentioned I have changed the injector plug on this cylinder but have confirmed that the injector is working via the screwdriver test.

 

What do I do next? :helpsmilie:

Try a coil on Cyl 1 and see what the Conzult says.

good you sorted it

Edited October 6, 201015 yr by errol.s