Very urgent help needed!!

4efteboost

4efteboost

Member +
Car is running on 3 cylinders, have tried changing the leads, spark plug, injectors and still not working.. There is no oil coming out of breather which happened when a piston went.. If i pull the lead out of no1 cylinder the car runs the same for some reason and same if i unplug the injector! If anyone has had this problem please please please tell me how to fix it
 
Texx

Texx

Super Moderator
Run the engine and then pull the spark plug out of cylinder No.1, if it's black and wet then you need to look for the ignition fault, if it's clean and dry then you may have a fuel injector or wiring problem. If you've got a compression tester handy, check cylinder No.1 whilst the plug is out.
 
4efteboost

4efteboost

Member +
The spark plug was dry and a bit orange and the rest were wet so led me to fuelling side of things but obv i put 4 new injectors on still same thing, i check the ignition side of things by taking the plug and putting it in the lead and then to the strut brace nut and turned the car over and defo got a spark. Could it be something to do with fuel pressure maybe not enough? Or fuel pump? Will try get a compression check done
 
Texx

Texx

Super Moderator
Pull the connectors from the injectors on cylinders 1 and 3, with the ignition switched OFF use a digital multimeter and check for continuity between the same colour wire terminals from both connectors. You should get a good continuity reading for both pairs of terminals.
 
4efteboost

4efteboost

Member +
Ok will try get someone to check that 2moro, is there anything else you can think of that i should also check?
 
4efteboost

4efteboost

Member +
Hi texx, just done That continuity test and is showing a circuit on both terminals so cant be the electrical side of things, someone mentioned it could be the fuel pump giving up? I just started it to check something and it was stinking of fuel!
 
Texx

Texx

Super Moderator
With the ignition ON, check for +12v between the injector connector and a good body earth point, I can't remember the wire colour although it could possibly be a black/red wire, but there's only 2 terminals to test so check both for +12v.

To check for a fuel pressure issue, block off the fuel return from the pressure regulator and run the engine. DO NOT run the engine for more than a few seconds, only run it long enough to identify if the engine is firing on all 4 cylinders. If that proves successful then you've identified an issue with either the pressure regulator or fuel pump.
 
4efteboost

4efteboost

Member +
Ok kool will check all that later when im home from work, its just weird how it done as i was going 30mph but i was going uphill so slight strain on engine but even then i was boosting
 
4efteboost

4efteboost

Member +
Right just done a compression test and the results are:
1st cyl - 4 bar
2nd cyl - 4 bar
3rd cyl - 11 bar
4th cyl - 11 1/2 bar

What does this mean?
 
M

M1cky

Fresh Recruit
As you have low compression across 2 cylinders id be heading straight for the headgasket my man! if it was pistons or rings i would have thought it would start breathing heavily!
 
weeJohn

weeJohn

Lifer
Looks like its gone between 1 and 2, pour a teaspoon of oil into 1 and 2 and see if the reading goes up, if not then its the gasket rather than rings or a piston.
 
4efteboost

4efteboost

Member +
Will do that tea spoon of oil thing in the morning i think, if it is head gasket is it easy to repair yourself? Im not the best with cars but if i can change turbo, fuel rail, injectors and loads if other shit with no help or experience it cant be that hard right? Lol
 
T

tersplat

Member +
IT's probably one of the more difficult things to do on an engine, especially ours since you have to take the cams completely out to pull the head, and then time everything properly upon reinstallation. but it is doable with enough attention to detail and mechanical skill.
 
4efteboost

4efteboost

Member +
Im not a mechanic but i will check double check then triple check lol the timing is gonna be the hardest bit for me but its not rocket science so should be able to do it and if not got mates who are mechanics but are arseholes as soon as you mention can you help me haha
 
weeJohn

weeJohn

Lifer
Its better left to someone who knows what they are doing, its a job to do once and do right, no point in taking short cuts or trying to do it cheap.
 
T

TheStarletGT

Member +
I had 2 pistons crack at the same time, thus causing oil to be pumped into the intake manifold, with a old 4efte i had. So since your statin g that there is no blowby, it does indeed sound like a HG.


PS: I had this exact issue with another engine.

50psi in cylinder 1 and 2, and 160psi in 3 and 4, was a HG failure.
 
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