Car starts, dies under load

[Stag]

Bit weird without any metrics at all, leaving you with trial/error.

When it idles, it idles OK. No bumbling or obvious misfiring.
So we've got fuel and spark.

At first start and idle it has no o2 feedback at all, so it's running "dumb" off the ecu.

The car has mechanisms to protect against MAF failure; engine vacuum measurement. Its last hope for knowing how much fuel to put in. As fuel goes in and timing changes, revs rise, which changes vacuum.
That's why my thought goes to MAF.

Unplugging maf does little. Tell tale sign for any sensor. If you remove it and there's no or little change, it's probably duff.

Big unknown is the harness. It could have been nicked during removal etc.

Do you have an OBD2 dongle and android phone? Or iPhone and WiFi obd2 dongle?

I have a obd reader, just a cheap one from euro car parts. Did the job before but now when ever I try to read anything I just get "link error"

Swapping the harness over a good place to start ?

[shnazzle]

Bit weird without any metrics at all, leaving you with trial/error.

When it idles, it idles OK. No bumbling or obvious misfiring.
So we've got fuel and spark.

At first start and idle it has no o2 feedback at all, so it's running "dumb" off the ecu.

The car has mechanisms to protect against MAF failure; engine vacuum measurement. Its last hope for knowing how much fuel to put in. As fuel goes in and timing changes, revs rise, which changes vacuum.
That's why my thought goes to MAF.

Unplugging maf does little. Tell tale sign for any sensor. If you remove it and there's no or little change, it's probably duff.

Big unknown is the harness. It could have been nicked during removal etc.

Do you have an OBD2 dongle and android phone? Or iPhone and WiFi obd2 dongle?

I have a obd reader, just a cheap one from euro car parts. Did the job before but now when ever I try to read anything I just get "link error"

Swapping the harness over a good place to start ?

If you can pull the engine out of the car, swap harness, and put back in in the time you have..... Then still no


The obd2 not working is very suspect.... Is there any way you can get the part number printed on the ecu?

[Stag]

Bit weird without any metrics at all, leaving you with trial/error.

When it idles, it idles OK. No bumbling or obvious misfiring.
So we've got fuel and spark.

At first start and idle it has no o2 feedback at all, so it's running "dumb" off the ecu.

The car has mechanisms to protect against MAF failure; engine vacuum measurement. Its last hope for knowing how much fuel to put in. As fuel goes in and timing changes, revs rise, which changes vacuum.
That's why my thought goes to MAF.

Unplugging maf does little. Tell tale sign for any sensor. If you remove it and there's no or little change, it's probably duff.

Big unknown is the harness. It could have been nicked during removal etc.

Do you have an OBD2 dongle and android phone? Or iPhone and WiFi obd2 dongle?

I have a obd reader, just a cheap one from euro car parts. Did the job before but now when ever I try to read anything I just get "link error"

Swapping the harness over a good place to start ?

If you can pull the engine out of the car, swap harness, and put back in in the time you have..... Then still no


The obd2 not working is very suspect.... Is there any way you can get the part number printed on the ecu?

That the one ?

[Stag]

imgur.com/Pfpc5N4

Won't let me lost it for some reason

[shnazzle]

Definitely an EU spec ecu. Pre-fl.
Is that your old ecu? Or is it a replacement?

[Stag]

Definitely an EU spec ecu. Pre-fl.
Is that your old ecu? Or is it a replacement?

It's the same eu that was in the car. Only thing that's changed is the engine, did new clutch and belt n pump while I was in there

[normanh]

Airflow meter?

Norman

[Stag]

Little update, removing the maf sensor, allows me to rev freely no lag in revs second I put my foot down it revs instantly. But only up to 3k, does this solve it ? Is it for sure the maf ?

[shnazzle]

Little update, removing the maf sensor, allows me to rev freely no lag in revs second I put my foot down it revs instantly. But only up to 3k, does this solve it ? Is it for sure the maf ?

It is rather suspicious isn't it?  

Contact Dick Sloan @dick2ski or Dean for a 2nd hand. Dick will ship it very quickly if asked.

[Stag]

Little update, removing the maf sensor, allows me to rev freely no lag in revs second I put my foot down it revs instantly. But only up to 3k, does this solve it ? Is it for sure the maf ?

It is rather suspicious isn't it?

Contact Dick Sloan @dick2ski or Dean for a 2nd hand. Dick will ship it very quickly if asked.

When I click on dicks @ you provided he's not been online since may and has 1 post ?

[shnazzle]

Little update, removing the maf sensor, allows me to rev freely no lag in revs second I put my foot down it revs instantly. But only up to 3k, does this solve it ? Is it for sure the maf ?

It is rather suspicious isn't it?

Contact Dick Sloan @dick2ski or Dean for a 2nd hand. Dick will ship it very quickly if asked.

When I click on dicks @ you provided he's not been online since may and has 1 post ?

Sorry, yes, that's correct. His contact details are in the breakers section in the marketplace. Givr him a call. If he's got one he 'll post it today if he can

[Carolyn]

Little update, removing the maf sensor, allows me to rev freely no lag in revs second I put my foot down it revs instantly. But only up to 3k, does this solve it ? Is it for sure the maf ?

Bloody well looks like it to me!!

[Stag]

Huge thank you to both @Carolyn and @shnazzle you've both been a massive help, I'll update you once I get a new maf in her

[Ardent]

When it arrives. Give it a clean with your spray of choice.

Bear in mind the 2 delicate wires hidden from view. Spray but don't touch.

Depending on the spray used. The O ring can react and go a bit "baggy" (technical term)

Best to GENTLY remove O ring 1st. Spray -dry - refit.

Might as well pull the ECU fuse whilst doing this to reset. So when all back together, starting from a stock position.

[Carolyn]

Failing all else:

https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=avensis+2002+maf&_sacat=0

Take yer pick!!

[Ardent]

Yep.
2 Toyota's and a lexus.
The 2, a 1.5 Prius and a 3.3 v6 rx400h.
All the same maf.

[Stag]

So I spoke to dick, he said he can send me one out, asked where I was. Turns out he was in my town yesterday collecting a mr2 off someone that lives in my town.

Long story short, the guy he collected it off has one, he's only 5 mins away.

We will have some answers tomorrow boys

[shnazzle]

So I spoke to dick, he said he can send me one out, asked where I was. Turns out he was in my town yesterday collecting a mr2 off someone that lives in my town.

Long story short, the guy he collected it off has one, he's only 5 mins away.

We will have some answers tomorrow boys

Nice! What are the odds of that? Gotta love the '2 community eh?

[Ardent]

We will have some answers tomorrow boys

And girls

[1979scotte]

We will have some answers tomorrow boys

And girls

Let's not forget the girls.
We have several.

[Stag]

New maf in, Suprise suprise its STILL not working

[Carolyn]

Oh dear....

Back to finding a ground/wiring fault it would seem.

[Stag]

Oh dear....

Back to finding a ground/wiring fault it would seem.

How big of a job is swapping the looms over ?

[Carolyn]

Bit of a bugger, but it's been done before.

Some people (who hadn't been told any different) have taken the loom off for and engine-out and then put it back on when the engine was back in.  The hardest bit is underneath (especially between the inlet manifold and block).

Have you tried spraying out and blowing out the MAF connector and checking pins?  Worth a look?

[Stag]

Will get back to you, Need some more  contact cleaner from ECP. Give it a clean