LS1 Throttle Response issue

[boxhead]

If plugs dont help, I know a few guys have had injector issues after the engine has been sitting a while?

I think I was lucky, I had no issue that was not induced by me.

[gjkrv8]

Originally Posted by boxhead

If plugs dont help, I know a few guys have had injector issues after the engine has been sitting a while?

I think I was lucky, I had no issue that was not induced by me.

Injectors are my next option after plugs.

I have induced a few errors myself as well.

Boxhead, do you have any instructions on Inspecting/cleaning the injectors?

Rgds

Gregg

[acecob]

Now this is a great op for us ford guys
ANY TAKERS ?

I'll come back later to add on

[Gaz64]

Greg, I work For Holden, I have a few questions and hopefully will be able to help you.

What ECM are you using, factory or aftermarket?

If it's factory are you using the AFM or has it got a mafless tune?

While searching for a misfire/flatspot etc, you should not disconnect the sparkplugs with the engine running.
What happens is the other three on that bank will go richer to compensate for the high oxygen content emitted from the cylinder you cause the misfire on. Although unburnt fuel comes out the exhaust port, it's the oxygen we haven't used that causes the others to go rich.

Have you put TECH 2 on yet to see what codes (if any) are stored.

Lean bank DTCs P0170, P0171 are common and PCV ventilation hose or loose intake gaskets are common.

If you can drive through the flat spot and it makes good power, then you can count the fuel system and the igntion system out. I'd say you might have a fuel trim issue, look at data display STFT and LTFT.

[gjkrv8]

Originally Posted by Gaz64

Greg, I work For Holden, I have a few questions and hopefully will be able to help you.

What ECM are you using, factory or aftermarket?

If it's factory are you using the AFM or has it got a mafless tune?

While searching for a misfire/flatspot etc, you should not disconnect the sparkplugs with the engine running.
What happens is the other three on that bank will go richer to compensate for the high oxygen content emitted from the cylinder you cause the misfire on. Although unburnt fuel comes out the exhaust port, it's the oxygen we haven't used that causes the others to go rich.

Have you put TECH 2 on yet to see what codes (if any) are stored.

Lean bank DTCs P0170, P0171 are common and PCV ventilation hose or loose intake gaskets are common.

If you can drive through the flat spot and it makes good power, then you can count the fuel system and the igntion system out. I'd say you might have a fuel trim issue, look at data display STFT and LTFT.

Thanks Gary for the suggestions.

I am running a stock ECU and tune with MAF.

No I havent put a TECH 2 on to see what the ECU thinks. I dont have access to one or know someone who has one at present.

I will double check the PCV hose and intake gaskets.

I wouldnt say it is making good power at the moment (say medium power at present), you can increase revs at a medium pace but when you give it a bit it struggles.

I am still suspect on the ignition system. Am changing the plugs tomorrow to rule them out.

Was thinking if that doesnt resolve it to double check the coils are ok somehow.

Then trying to find someone with TECH 2 to see what codes are being stored etc.

Last resort was a compression check?

Rgds

Gregg

[Aussie Mike]

Greg, I've got the gear to give your injectors an ultrasonic clean. I've got a heavy duty ultrasonic bath that I've done a few sets in now. Seems to work real well. I'm back in Aus so bring them over if you like.

Cheers

[gjkrv8]

Originally Posted by Aussie Mike

Greg, I've got the gear to give your injectors an ultrasonic clean. I've got a heavy duty ultrasonic bath that I've done a few sets in now. Seems to work real well. I'm back in Aus so bring them over if you like.

Cheers

Mike, thanks for the offer.

I am hoping that replacing the spark plugs will do the job - but down the track cleaning the injectors would be a good idea yo ensure all is performing as it should.

I am planning on going to the Melb Club meeting tonight - hope to catch up with you there if you're going.

Rgds

Gregg

[boxhead]

Originally Posted by acecob

Now this is a great op for us ford guys
ANY TAKERS ?

I'll come back later to add on

See Peter, all you Ford guys are speachless, you have never heard of one of these having trouble, so you dont know what to say.

Go the mighty beer can

[tomcat racing]

Originally Posted by boxhead

See Peter, all you Ford guys are speachless, you have never heard of one of these having trouble, so you dont know what to say.

Go the mighty beer can

i think ill pass, ive already stirred up a hornets nest. tomcat.

[boxhead]

Originally Posted by tomcat racing

i think ill pass, ive already stirred up a hornets nest. tomcat.

Nah, it is all in fun Tom, just take it all with a grain of salt these boat anchor V's beer can debates.

[acecob]

Originally Posted by boxhead

See Peter, all you Ford guys are speachless, you have never heard of one of these having trouble, so you dont know what to say.

Go the mighty beer can

ohhh come on Boxey 95% of the crap in these forums is all about these ls's with problems
Get with it son
There's nothing in here about any Ford issues
Don't know about beeing speechless, I think nobody knows were to Start

By the way GAz64 is on the money
Leads, coils, plugs cause miss fires if they are faulty especially under load, lack of power is in the tune and fuel trim, timing etc

[Tenrocca]

Originally Posted by acecob

There's nothing in here about any Ford issues

WINDSOR WONT BLOODY FIT THREAD - That would be the thread just below this one

I love the LS ford debate. My favourite is when you fellas go on about it being correct for the car - when half of you are happy to have a body that looks like it was moulded out of plasticine by a blind kid who once heard a cobra, or a hood scoop that could fit about 7 LS1's under it, or a single full width roll bar barely 6 inces off the rear deck, or a set of chrome sidepipes what look like they came off a Kenworth....so purist, and then you go and get all fussy about the badge on the engine. Cracks me up every time.

[Rebel1]

Originally Posted by Tenrocca

I love the LS ford debate. My favourite is when you fellas go on about it being correct for the car - when half of you are happy to have a body that looks like it was moulded out of plasticine by a blind kid who once heard a cobra, or a hood scoop that could fit about 7 LS1's under it, or a single full width roll bar barely 6 inces off the rear deck, or a set of chrome sidepipes what look like they came off a Kenworth....so purist, and then you go and get all fussy about the badge on the engine. Cracks me up every time.

I'm with you Tenrocca, and you forgot the intake manifold wot looks like it was stolen from a church organ.

[acecob]

Originally Posted by Tenrocca

WINDSOR WONT BLOODY FIT THREAD - That would be the thread just below this one

I love the LS ford debate. My favourite is when you fellas go on about it being correct for the car - when half of you are happy to have a body that looks like it was moulded out of plasticine by a blind kid who once heard a cobra, or a hood scoop that could fit about 7 LS1's under it, or a single full width roll bar barely 6 inces off the rear deck, or a set of chrome sidepipes what look like they came off a Kenworth....so purist, and then you go and get all fussy about the badge on the engine. Cracks me up every time.

Yeh.................