au falcon 6 not revving

chrispie123 · 07-07-2007, 04:12 PM

hi my au falcon 6 series 2 is not revving over 3000ish and surging and carrying on, it sometimes revs out if you do it slowly
any suggestions it was not long serviced filters fuel filter etc

redef · 07-07-2007, 04:20 PM

sound like a blocked exhaust if you have had your filter done. drop center section after cat see problem goes away.maybe fuel pump???

burnz · 07-07-2007, 04:26 PM

Quote:

Originally Posted by redef

sound like a blocked exhaust if you have had your filter done. drop center section after cat see problem goes away.maybe fuel pump???

yeah i think your on the money
check for a colapsed cat.

chrispie123 · 07-07-2007, 04:32 PM

yeh cat could highly be a possibilty, the exhaust has not long been replaced with 2.5inch but at idle there is a rattle coming from cat convertor hmmmm, may have to drop it and see, if it is whats the best replacement, would i be ok for a few weeks to gut it till the extractors get fitted and a new cat then

redef · 07-07-2007, 04:38 PM

they are a pain to gut bad angles. just see if you can get blocked bit out wont hurt for a couple of weeks.

burnz · 07-07-2007, 04:41 PM

if you gut the cat be shure their are no loose bit's
to blow into the resonator, otherwise that will block too.

chrispie123 · 07-07-2007, 05:04 PM

yeh was planning on putting a set of extractors on when i get tax back in a few weeks looks like a cat as well

GK · 07-07-2007, 06:05 PM

How many kays has the car done chrispie?

GK

chrispie123 · 08-07-2007, 10:30 AM

160,000kms

GK · 09-07-2007, 03:12 PM

Quote:

Originally Posted by chrispie123

160,000kms

Sounds like it's new cats for the both of us! LOL! Mine's done 162,000 kays!

GK

HLC · 09-07-2007, 03:31 PM

Quote:

Originally Posted by GK

Sounds like it's new cats for the both of us! LOL! Mine's done 162,000 kays!

GK

that means i have a year to save up for a new cat!!!! im on 135 000 and i do about 27 000kays a year haha

chrispie123 · 09-07-2007, 07:47 PM

so same symptoms gk?

GK · 09-07-2007, 08:01 PM

Quote:

Originally Posted by chrispie123

so same symptoms gk?

Inconsistent response when putting the foot down. A general feeling of being sluggish (not me the car! LOL!) and the surging as you mention.

GK

sly · 10-07-2007, 06:19 PM

Quote:

Originally Posted by chrispie123

hi my au falcon 6 series 2 is not revving over 3000ish and surging and carrying on, it sometimes revs out if you do it slowly
any suggestions it was not long serviced filters fuel filter etc

Had similar symptons at about 270,000k's. Had excessive endplay in the shaft that drives the oil pump and camshaft position sensor (CPS) (on intake side of block, where the camshaft was in the old 250). As the shaft bounced back & forward it flogged out the CPS, which in turn stuffed the injector timing as they switched from sequential to bank firing at around 3000 rpm. Endplay in this shaft is apparently a common problem in high-mileage I6's.

The fix ended up costing me about $1600. It required removing the radiator and front cover off the engine. Just as I sent it to the workshop I found a leak in the radiator, so I got that replaced at the same time, as well as the water pump and harmonic balancer.

It would be worthwhile to get your codes checked, most places I've spoken to will run diagnostics for between $60 and $90. This should tell you if it's a problem with fuel injection.

chrispie123 · 10-07-2007, 07:10 PM

its more a fuel flow related issue i sorta found out today as when i corner fuel runs out so i reckon i may have a fuel house in tank split or something

gtfpv · 10-07-2007, 08:19 PM

it has gone into LIMP MODE. one of your sensors has failed . disconnect all your plugs on throttle body, and else, and reconnect again . then disconnect your battery for 30 minutes . and try it then , go driving for 30 minutes . if still the same . go to dealer/ or auto electrician for diagnosis., either this or an exhaust blockage or both . but id say it has gone into limp mode .

chrispie123 · 10-07-2007, 09:40 PM

so what does limp home mode do i know about the auto but not on motor side

gtfpv · 11-07-2007, 12:00 AM

Quote:

Originally Posted by chrispie123

so what does limp home mode do i know about the auto but not on motor side

basically , limp home mode on your engine is controlled by the ECU. it fixes the timing to one position and lowers maximum revs. it will not accelerate fast, becuase of this the auto feels wrong and delays changing gear etc etc.
It is triggered when a fault occurs on engine monitoring componants which go outside the operable scale . the limp mode comes in and, allows safe engine operation. i just thought of something with the AU. AS WELL it will go into SAFE MODE if the water runs out of the radiator . another mix to the equation . more to go wrong .
an example of an engine going into limp mode is when water gets into throttle sensors etc etc etc etc .
it happened with my EL . I unplugged the throttle body sensor and replugged it . disconnected the battery to reset the ECU. and then over 20minutes of driving the ECU learnt the driving style again ' it was an eary experiance but true.

chrispie123 · 13-07-2007, 07:13 PM

ok problem 100 percent sorted today got another 2nd hand cat on loan which didnt fix it pulled out fuel pump and the bottom mesh thing was completely blocked in sludge so cleaned it out and cleaned out tank, the car has never driven so good heaps smoother all over and now revs

GK · 13-07-2007, 07:21 PM

Quote:

Originally Posted by chrispie123

ok problem 100 percent sorted today got another 2nd hand cat on loan which didnt fix it pulled out fuel pump and the bottom mesh thing was completely blocked in sludge so cleaned it out and cleaned out tank, the car has never driven so good heaps smoother all over and now revs

Good outcome chrispie! My wagon is on LPG so the filter trick isn't going to help me! LOL!

I'm looking at a new cat and possibly exhaust tomorrow morning.

Glad you've got it sorted.

Cheers,

GK

chrispie123 · 13-07-2007, 07:31 PM

yeh was going to suggest it to you