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 Post subject: run on
Posted: Thu Nov 06, 2008 12:11 am 
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Location: perth
WA, Australia

iv a 351 xr. time it to the marks runs ok dosent ping but turn it off and it just runs on. then if you advance it to stop run on it pings its head of what gives any ideas ps yes it has electronic ignition eg billet dizzy plus 6al
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Posted: Thu Nov 06, 2008 12:23 am 
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Ride: ED EF and AU V8s

Location: Perth
WA, Australia

What sorta compression it running? also is the throttle shut when your turning it off

Wouldnt think its the igniton system, unless the wiring for it is wrong and its still getting power for spark while you turn it off.

Does it stop running straight away, say if you remove the coil lead?

 

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 Post subject: run on
Posted: Thu Nov 06, 2008 12:32 am 
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Location: perth
WA, Australia

rebuilt motor standard comp 600 holley seams to run on now that i think about since hooley electric pump was installed 5 days ago and yes there a piece of s**t o noisey maybe ok for a drag car but not a cruiser and iv rubber mounted it
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Posted: Thu Nov 06, 2008 7:23 am 
Getting Side Ways
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Ride: EA SVO, AU2 Forte

Location: Bendigo
VIC, Australia

has the carby got a fuel cut off solenoid?

 

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Daily driver: AU2. 5 speed. 19" FG luxos. Full exhaust. Lowered. AU3 XR leather interior, converted to full power windows. 3.45 LSD. IN THE FUTURE: Tickford 6
Weekend driver: EA SVO AU motor. Built BTR. TCE 2800 stall. T76 turbo. Locked diff. On E85. approx 320rwkw. 11.5 @121mph

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Posted: Thu Nov 06, 2008 10:56 am 
Getting Side Ways
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Location: Adelaide
SA, Australia

I wouldnt advance the iginition timing to stop running on, if its caused by timing you will need to retard it.
Try turning it off in gear, or stall it out if its manual.

 

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Posted: Thu Nov 06, 2008 7:40 pm 
Getting Side Ways
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The idle speed should be adjusted on throttle idle plunger [solenoid], not the idle screw.. So when key is turned off .. The butterfly closes completely..
If it doesn't have idle plunger [whatever its called?] Then try to set idle as low as you can ..
Idle mixture as lean as possible also...
May pay to check heat range of plugs ??
Try one range colder...

 

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331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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Posted: Thu Nov 06, 2008 10:39 pm 
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id first check for fuel trickling in down the throats of the carby whilst running, could be high float level or sticky needle n seat. if not check idle mixture screws, could be rich. base mixture setting 1 1/2 turns out. once set try turning the main idle speed screw down to lower the idle to around 600-750rpm.
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 Post subject: run on
Posted: Thu Nov 06, 2008 11:13 pm 
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Location: perth
WA, Australia

thanks guys il try turning idle down took electric pump of too noisey
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Posted: Fri Nov 07, 2008 8:38 pm 
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Ride: XC GXL

Location: perth
WA, Australia

MY XC 351 USED TO RUN ON ITS QUITE WORKED 10:1 KICKER PISTONS,270 CAM ETC AND IT WAS DETONATING IN THE MANIFOLD. HAVE A BAKERLITE CARBY SPACER(ONE INCH) AND ALLOY INTAKE (PERFORMER) NOW AND IVE SET THE TIMING TO 8 DEGREES AT AROUND 700RPM( 32DEGREES AT 3000) WITH A 600 HOLLEY(1850)WITH NO.66 JETS,STANDARD XD DIZZY, AND IT GOES WICKED WITH NO MORE RUNNING ON. IS IT HARD TO START HOT?

 

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Posted: Mon Nov 10, 2008 11:14 am 
Parts Gopher
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NSW, Australia

i get slight y run on to and after bene runnign for a bit once and a while its hard to start jsut doesnt wanna kick over till the third try

 

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Posted: Mon Nov 10, 2008 11:29 am 
Getting Side Ways
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If it pings ?? Check timing.. 90% of ping is timing...
Check the counterweight springs in dissy ??
They often break or go weak with age...
Tend to over advance at lower rpm...
We used two marks on ballancer .. One was for idle as normal.. The other mark was at 38* where max advance was at say?? 3000 rpm...
This way we were 100% sure to get timing right..
After all 3000 rpm is where the engine works and makes its power... Thats where the tune should be right!! Idle to a point doesn't matter..
Something is glowing in your combustion chambers to have it run on.. Carbon build up ? Or plugs being heat range too hot ??
Lowering rpm adle should help...
If carbon build up ?? Try a water injection system??
This will keep cylinders nice and clean...
Can be made from old washer bottle and small garden fogger jet.....

 

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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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