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Box stock T.

Popping her cherry

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Time dust off this old thread.

Old black betty has been doing really well till about a few weeks ago.

It's started to run a bit rough at idle then the other night it hit about 4700 -5000rpm had a boost cut out on 3rd and 4th gears. Traction control off.

Slight up hill load.

Coils might be due and plugs.

K&N pod definitely needs cleaning as does the o2 sensor, if not completely replaced like I did on the first round of mods.

Coils were done back in  Nov. 2016 when Jet did the intercooler install. And its definitely not a daily driver so surely they would last longer than that.

Thoughts before I start taking it a part..

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Man there's plenty of things to check in this situation. It's kind of a waste of time to say it might be this or that cos stuff needs to be checked before guessing what it might be.

 

I'd get in touch with jet and see if he can take it for a spin around the block with his laptop to see what's up with it.

 

Make sure you have fresh fuel in it, if and when you take it to him.

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Yep kinda thought the same thing.

That's why I put it to you guys for a bit of input.

Fuel and filter definitely could be another thing.

Jets like 50+ mins away from me so I will start eliminating things by inspection and maintenance. In all honesty I have been just driving it and not checking or maintaining it lately.

Throttle body clean.

Boost controller clean.

Pod clean

Oil and filter.

O2 sensor clean/replce. Overdue.

Plugs replaced and regapped.

Coils maybe. Still have a full set of ones I replaced, I can try them.

   cheers nath. :happyfriends:

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If you are going to do all of those things you might just sort it out.

 

You did mention a couple of things that came to mind from your first post.

 

I'd try the coils after everything else though cos the ones in the car now should be fine.

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Coils should be least of the trouble, I'm lucky to do 5000 km's in a year in it.

All other things I have done at some stage of the modification journey so hopefully one of the above things will solve the problem.

Game of elimination beings.:wwww:

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Well man now that we're talking about it, I'd go some wd40 in the boost solenoid, and plugs first. 

 

They seem like the most likely culprits for the symptoms but I guess we'll see. 

 

Swap stuff a bit at a time so you know what fixes the various issues.

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13 hours ago, Box stock T. said:

Time dust off this old thread.

Old black betty has been doing really well till about a few weeks ago.

It's started to run a bit rough at idle then the other night it hit about 4700 -5000rpm had a boost cut out on 3rd and 4th gears. Traction control off.

Slight up hill load.

Coils might be due and plugs.

K&N pod definitely needs cleaning as does the o2 sensor, if not completely replaced like I did on the first round of mods.

Coils were done back in  Nov. 2016 when Jet did the intercooler install. And its definitely not a daily driver so surely they would last longer than that.

Thoughts before I start taking it a part..

 

Running rough at idle typically points to all the usual items so start with plugs and moving through to expensive parts 

 

I’ve got a pretty close boost cut on your car due to it being a BA and at ~14 psi now so you probably were just in all the right situations to induce a touch of over boost and I’ve not given you any room to play there xD 

 

if in doubt bring her down ;) 

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Haha cheers buddy, I do remember you mentioning the boost cut when we had a chat when I picked it up on the last tune.

Now ya say it, it's not happening very often because I did a quick test run today and it didn't cut.

Cheers for the parental restrictions buddy:mosking:.hahaha. If it saves the engine I'm all for it.

Plugs are definitely due and throttle body clean cleaned up idle last time so they will be done.

See how she goes if it's still not 100% I will give ya buzz jetters...

Cheers mate.:happyfriends:

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The more I think about it was it pretty close to the limiter. Couldn't really look at the gauge to see what rpm it happened at, but I was running it pretty long on both gear shifts. Following close behind a R33 GTR if ya get my drift.

So it probably was the boost cut at the end of the rev range.

Some more testing on a cooler day will reveal more me thinks.

See how it goes.

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7 minutes ago, k31th said:

bugger... haha

Yeah he was already at 80km's+ when I turned onto the road. He was only a car length in front when we backed off.

But behind is behind.

That's second place right.

 

:pandalol:

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23 minutes ago, Box stock T. said:

Yeah he was already at 80km's+ when I turned onto the road. He was only a car length in front when we backed off.

But behind is behind.

That's second place right.

 

:pandalol:

Edited by BAXRTUTE

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Finally got a bit of time to do a

throttle body clean and checked and cleaned all spark plugs.

They all were a nice light grey colour except one was a little darker.

So a quick swap out with a spare fresh identical plug/ regapped was put in.

A quick oil level check, still spot on Full.

 

Definitely has cleaned up a slightly crappy idle issue.

Next on the cards is a new O2 sensor and check all turbo to manifold bolts and then throw it on the hoist at the workshop for general look over to see what may need attention.

Check diff fluid so on and so forth.

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Haha yeah good work. Usually sorting a rough idle in a Falcon is:

Step 1: go grey
Step 2: become alcoholic
Step 3: learnt to live with rough idle

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2 hours ago, Puffwagon said:

Glad you got that idle sorted easily.

Car seems alot more responsive as well.

Maybe just a placebo effect eitherway,I'm just glad it's a lot better behaved at the lights and when sitting in the driveway after some boosted driving.

1 hour ago, El Andrew said:

Haha yeah good work. Usually sorting a rough idle in a Falcon is:

Step 1: go grey
Step 2: become alcoholic
Step 3: learnt to live with rough idle

Im definitely Step 1.

Definitely not Step 2.

Step 3 is a tuned/ modified falcon thing.

But it can be sorted by a game of elimination. Or just install hot cams then there's a reason for lumpy idle.

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A bit puzzled, yesterday I replaced two lost turbo bracket bolts.

The bracket that has the wastegate actuator on it. Farkn fun that was to get to. But got it done.

Now after taking it for a spirited thrash on the way home last night it start hitting a backfire and smoke kick out the back. 4000 -5000RPM on full boost.

I have replaced coils with genuine units recently.

Just under half of a tank of fuel, so hoping it's not surge issues.(255 walbro with small pot drop in set up)

Im gonna try a set of SK20R7 spark plugs.

315 rwkw's on 14.5 psi.

8 psi garrett actuator.

 

Any ideas on what it could be would be well received.

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