Help: Problem with acceleration

blair · 07-11-2009, 03:56 PM

Hi,

I own a Mazda Eunos 800.

This is the V6 2.3L supercharged model.

When I put my foot down half way...no problem.

Smooth power delivery.

When I plant my foot to the floor the car starts "shunting" it wants to deliver power and tries too...but then backs off.

Hence the "shunting" motion backwards and forwards.

What could this be related too?.

The engine management system?
The fuel pump?
Faulty injectors?

Any help would be greatly appreciated, before I take it too a mechanic.

Cheers!

Blair

matty88 · 07-11-2009, 04:08 PM

Boost cut? Replace the fuel filter for starters

Rupewrecht · 07-11-2009, 04:48 PM

Distributor, i think

And welcome to AGT.

maztech · 07-11-2009, 05:35 PM

My experiance on these cars it could be a number of issues -- have you had a cambelt done on the car recently -- could be plugs or vac lines split or on the incorrect way -- could be injectors ,fuel pump or coil packs or dizzy --- check codes -- word of advise dont take it to a place that doesnt know the car the 800m and FD rx7 so many mechanics have stuffed up and it takes ages to fix the problem cause they wont tell anyone what they touched... I have worked on these cars since they were brought out .

project.r.racing · 07-11-2009, 06:54 PM

hole in 1 spark plug lead.

maztech · 07-11-2009, 07:27 PM

Quote:

Originally Posted by project.r.racing

hole in 1 spark plug lead.

No leads on these cars all coil packs

blair · 08-11-2009, 10:20 AM

Thanks guys for your help,I really appreciate it.

Sounds like it could be any number of issues...thanks maztech for your advise.

Cheers

Blair

maztech · 08-11-2009, 10:26 AM

What state you from Blair?

blair · 08-11-2009, 12:06 PM

I'm N.Z

Update:

I just dropped in a bottle of X-1R into the tank.

-http://www.x1r.com.my/petrol_treatment.html

Problem solved.Clean power right the way through......

Must have been really dirty injectors.

In case anyone else has the same prob.

Cheers

Blair

BTW: Check out my pix

maztech · 08-11-2009, 03:50 PM

Have fun pulling them out to be cleaned and change your fuel filter , it is in the boot under the carpet LHS of car ( if you didnt know where it is)

07-11-2009, 03:56 PM	#1
blair Junior Member Join Date: Nov 2009 Location: . Car: mazda eunos 800 2.3 V6 Posts: 3	Help: Problem with acceleration Hi, I own a Mazda Eunos 800. This is the V6 2.3L supercharged model. When I put my foot down half way...no problem. Smooth power delivery. When I plant my foot to the floor the car starts "shunting" it wants to deliver power and tries too...but then backs off. Hence the "shunting" motion backwards and forwards. What could this be related too?. The engine management system? The fuel pump? Faulty injectors? Any help would be greatly appreciated, before I take it too a mechanic. Cheers! Blair

07-11-2009, 04:48 PM	#3
Rupewrecht Administrator Join Date: Mar 2002 Location: melb.vic.au Car: AZ-1, Astina Hardtop Turbo, BJ Protege, Beetle Posts: 16,525 View Photos By: Rupewrecht	Distributor, i think And welcome to AGT. __________________ jdmparts.rupewrecht.com Sourcing your not-quite-overnight parts from Japan WRECHT--\|--SLOWTEGE--\|--BEETLE--\|--SUBSTITUTE--\|--AZ-1

08-11-2009, 12:06 PM	#9
blair Junior Member Join Date: Nov 2009 Location: . Car: mazda eunos 800 2.3 V6 Posts: 3	I'm N.Z Update: I just dropped in a bottle of X-1R into the tank. -http://www.x1r.com.my/petrol_treatment.html Problem solved.Clean power right the way through...... Must have been really dirty injectors. In case anyone else has the same prob. Cheers Blair BTW: Check out my pix Last edited by blair; 08-11-2009 at 12:53 PM.

07-11-2009, 04:08 PM	#2
matty88 Junior Member Join Date: Jan 2008 Location: S/E Suburbs Car: 1991 TX3 KF Posts: 83	Boost cut? Replace the fuel filter for starters

07-11-2009, 05:35 PM	#4
maztech Senior Member Join Date: Aug 2009 Location: QLD Car: ...... Posts: 952	My experiance on these cars it could be a number of issues -- have you had a cambelt done on the car recently -- could be plugs or vac lines split or on the incorrect way -- could be injectors ,fuel pump or coil packs or dizzy --- check codes -- word of advise dont take it to a place that doesnt know the car the 800m and FD rx7 so many mechanics have stuffed up and it takes ages to fix the problem cause they wont tell anyone what they touched... I have worked on these cars since they were brought out .

07-11-2009, 06:54 PM	#5
project.r.racing Senior Member Join Date: Sep 2004 Location: n/a Car: n/a Posts: 10,929	hole in 1 spark plug lead.

08-11-2009, 10:20 AM	#7
blair Junior Member Join Date: Nov 2009 Location: . Car: mazda eunos 800 2.3 V6 Posts: 3	Thanks guys for your help,I really appreciate it. Sounds like it could be any number of issues...thanks maztech for your advise. Cheers Blair

08-11-2009, 10:26 AM	#8
maztech Senior Member Join Date: Aug 2009 Location: QLD Car: ...... Posts: 952	What state you from Blair?

08-11-2009, 03:50 PM	#10
maztech Senior Member Join Date: Aug 2009 Location: QLD Car: ...... Posts: 952	Have fun pulling them out to be cleaned and change your fuel filter , it is in the boot under the carpet LHS of car ( if you didnt know where it is)