Car starts, dies under load

[Stag]

Different fully charged battery in the car, Now it wont start whats so ever. Still has fuel. Since we put the old maf back in, its dead.

[1979scotte]

It's time to give it a rest I reckon. Tired brains don't work so well.

[househead]

It's time to give it a rest I reckon. Tired brains don't work so well.

There's a lot to be said for this!

[Stag]

Only one thing I feel like there is to do right now, To the pub for a pint. We will get there

[shnazzle]

@Stag did you mean this wire? It's the only single wire I can think of. And it's rather critical.
You cannot view this attachment.

[Stag]

@Stag did you mean this wire? It's the only single wire I can think of. And it's rather critical.
You cannot view this attachment.

cant really make it out from that photo, But if thats the earth coming off the head then no.

[Stag]

Fresh day, fresh ideas. Anyone got anything else in mind.

Just as a little recap.

Maf has been swapped
Harness has been swapped
Throttle body and sensors swapped
All grounds are 100% grounded

After we swapped the harness, and unplugged the maf it would start and rev freely without any hesitation.

We put the original maf in to see what would happen with that in. Now it won't even start. It's still getting spark but not running, I've put the new maf back in but it still won't run ?

[Carolyn]

Fresh day, fresh ideas. Anyone got anything else in mind.

Just as a little recap.

Maf has been swapped
Harness has been swapped
Throttle body and sensors swapped
All grounds are 100% grounded

After we swapped the harness, and unplugged the maf it would start and rev freely without any hesitation.

We put the original maf in to see what would happen with that in. Now it won't even start. It's still getting spark but not running, I've put the new maf back in but it still won't run ?

Are the injectors working?

[Stag]

T

Fresh day, fresh ideas. Anyone got anything else in mind.

Just as a little recap.

Maf has been swapped
Harness has been swapped
Throttle body and sensors swapped
All grounds are 100% grounded

After we swapped the harness, and unplugged the maf it would start and rev freely without any hesitation.

We put the original maf in to see what would happen with that in. Now it won't even start. It's still getting spark but not running, I've put the new maf back in but it still won't run ?

Are the injectors working?

Unfortunately I'm not home right now, anything else to check?

I'll get some easy start on it

[Carolyn]

Don't do that.  It solves nothing and stresses the hell out of the pistons.

[Stag]

Don't do that.  It solves nothing and stresses the hell out of the pistons.

Ah okay thanks Carolyn. I'll get back to you on the injectors. Would the maf not being attached cause a injector to break ?

[Carolyn]

Just had a quiet chuckle...

No the Maf won't break an injector.  I'm just checking that you've still got the basic ingredients for the engine to run.  (Air Spark, fuel).

Reset the ECU while you're at it. (disconnect the negative side of the battery for ten minutes....) just to see if it's playing games.

[Stag]

Just had a quiet chuckle...

No the Maf won't break an injector.  I'm just checking that you've still got the basic ingredients for the engine to run.  (Air Spark, fuel).

Reset the ECU while you're at it. (disconnect the negative side of the battery for ten minutes....) just to see if it's playing games.

Just had a quiet chuckle...

No the Maf won't break an injector.  I'm just checking that you've still got the basic ingredients for the engine to run.  (Air Spark, fuel).

Reset the ECU while you're at it. (disconnect the negative side of the battery for ten minutes....) just to see if it's playing games.

I'm still learning, leave me be :') many silly questions to come. I'll let you know once I try it. Should be home at 5:30 ish, thanks again Carolyn

[Ardent]

Just thinking aloud, but not really bringing any solutions.

Is the maf, a red herring/distraction at this point?

Engine is going to be cold on these starts. Does the ecu not run in a closed loop until up to temp. Ignoring sensory input till then. I say this, as it runs/ran when disconnected.

I was also thinking along the lines of a blocked cat. But it ran fine. So unlikely that.

Which brings back to elecs fuel air.
We have sparks. Are they the correct sparks. New plugs if I recall. Which plugs and what gap? But it ran so suggests ok.
Fuel. Certainly had fuel recently as you could smell it and of course it ran.
Air. Have you had chance to put stock air feed back in. (Sorry if missed that bit)
No vacuum leaks in the pipework between maf and tb. Secure at tb end?

Can a blocked/stuck pcv cause a non start?

Back to elecs.
There has to be question mark regards the loom. Has one or both chaffed somewhere. Bugger to find if it is.

The non starting. Is it firing or nothing at at all?
Having swapped the looms over again.  Has this messed up anything regards immoblising ?

[Stag]

Just thinking aloud, but not really bringing any solutions.

Is the maf, a red herring/distraction at this point?

Engine is going to be cold on these starts. Does the ecu not run in a closed loop until up to temp. Ignoring sensory input till then. I say this, as it runs/ran when disconnected.

I was also thinking along the lines of a blocked cat. But it ran fine. So unlikely that.

Which brings back to elecs fuel air.
We have sparks. Are they the correct sparks. New plugs if I recall. Which plugs and what gap? But it ran so suggests ok.
Fuel. Certainly had fuel recently as you could smell it and of course it ran.
Air. Have you had chance to put stock air feed back in. (Sorry if missed that bit)
No vacuum leaks in the pipework between maf and tb. Secure at tb end?

Can a blocked/stuck pcv cause a non start?

Back to elecs.
There has to be question mark regards the loom. Has one or both chaffed somewhere. Bugger to find if it is.

The non starting. Is it firing or nothing at at all?
Having swapped the looms over again.  Has this messed up anything regards immoblising ?

It's noting to so with the immobiliser, get no light flashing. It turns over but won't start, it will back fire occasionally but won't start. Weak spark possibly ? The spark from the plugs is more of a golden as oppose to blue.


Update time, everyone was right yesterday saying I needed to give it a rest as tired brains dont work well. Turns out it was not starting because the oil dipstick was not in.

So we are back to the bouncing off 3k when the limiter when the maf is unplugged and the waves of revs when plugged in.


I messaged @shnazzle bit embarrassing but when changing the harnesses over I pulled a wire out of the sensor

It's on the driver side of the harness

https://imgur.com/a/9aRD9KG

This is the wire. What is it ? If I want to unplug it Ill have to take the belt off and the alternator

[Stag]

Thought this would help show you guys what I mean

[Carolyn]

The oil dipstick won't have any effect on the engine running.

There is no sensor on the driver's side near the top.

You are not explaining things very well now.  It#s hard to make sense of what you're saying.

Does that plug connect to something behind the inlet manifold?

Behind there are the knock sensor and a connector for the crank sensor.  There's also a three-pin plug that goes on the alternator.

You say 'if I want to unplug it' but it IS unplugged.

How many pins in that plug?  Can't see in the pic.

You need to slow down, 'cos this is getting silly now.

I'll pull out my spare engine tomorrow and remind myself of which plugs are in the area.

[Stag]

The oil dipstick won't have any effect on the engine running.

There is no sensor on the driver's side near the top.

You are not explaining things very well now.  It#s hard to make sense of what you're saying.

Does that plug connect to something behind the inlet manifold?

Behind there are the knock sensor and a connector for the crank sensor.  There's also a three-pin plug that goes on the alternator.

You say 'if I want to unplug it' but it IS unplugged.

How many pins in that plug?  Can't see in the pic.

You need to slow down, 'cos this is getting silly now.

I'll pull out my spare engine tomorrow and remind myself of which plugs are in the area.

https://imgur.com/j5JSbu3

This is the sensor it's underneath the inlet manifold. It has just the one pin.

[Carolyn]

The oil dipstick won't have any effect on the engine running.

There is no sensor on the driver's side near the top.

You are not explaining things very well now.  It#s hard to make sense of what you're saying.

Does that plug connect to something behind the inlet manifold?

Behind there are the knock sensor and a connector for the crank sensor.  There's also a three-pin plug that goes on the alternator.

You say 'if I want to unplug it' but it IS unplugged.

How many pins in that plug?  Can't see in the pic.

You need to slow down, 'cos this is getting silly now.

I'll pull out my spare engine tomorrow and remind myself of which plugs are in the area.

https://imgur.com/j5JSbu3

This is the sensor it's underneath the inlet manifold. It has just the one pin.

Knock sensor.. Never tried to run an engine with it disconnected, but I suspect it would really mess with things....

[Stag]

The oil dipstick won't have any effect on the engine running.

There is no sensor on the driver's side near the top.

You are not explaining things very well now.  It#s hard to make sense of what you're saying.

Does that plug connect to something behind the inlet manifold?

Behind there are the knock sensor and a connector for the crank sensor.  There's also a three-pin plug that goes on the alternator.

You say 'if I want to unplug it' but it IS unplugged.

How many pins in that plug?  Can't see in the pic.

You need to slow down, 'cos this is getting silly now.

I'll pull out my spare engine tomorrow and remind myself of which plugs are in the area.

https://imgur.com/j5JSbu3

This is the sensor it's underneath the inlet manifold. It has just the one pin.

Knock sensor.. Never tried to run an engine with it disconnected, but I suspect it would really mess with things....

What do you suggest we try tonight then, Home from work now. Thanks, Louis.

[Carolyn]

Right now, Louis, I'm out of ideas.

I need the bloody thing in front of me.

[Stag]

Right now, Louis, I'm out of ideas.

I need the bloody thing in front of me.

Thank you for everything so far. We will get there

[jonbill]

So to recap, it revs out OK without a maf and bogs down with a maf?
Who made the MAF? Are either Denso?

And you still haven't got a connection out of your obd reader, which is a change from before the old engine had its "accident" right?

[Stag]

So to recap, it revs out OK without a maf and bogs down with a maf?
Who made the MAF? Are either Denso?

And you still haven't got a connection out of your obd reader, which is a change from before the old engine had its "accident" right?

revs okay without maf but only to 3k and then it bounces like its hit redline.
Both mafs are denso.
No connection to OBD but did before

[jonbill]

I think the obd link error is probably significant. Can you double check for bent pins in the ecu and harness plugs? To my Mind that's the most likely reason for the link error.