302 windsor / holley carb issues. PLEASE HELP!!

Postby coody » Sat Feb 06, 2016 10:14 pm

Hi guys,

My boat has a 302 windsor and is running up to shite. Wont start at all without a pump or two and half throttle, once goine it appears to run quite well above 2000rpm. However drop the revs back to near 1000 rpm and it is rough as guts, any less revs and it just dies instantly. When trying to accelerate hard off the 1000 rpm make( as if you were pulling up a skiier, it coughs and farts out the top of the carb.

Have replaced all spark plugs, replaced the ignition coil- was getting red hot so thaught could have internal short but no different, checked firing order is correct, pulled bowl off carb, floats dont appear to be stuck and do seal up, couldnt see any in the jets.

At a loss now, can anyone shed any light on what to look for next?

Its a early 70's fairly stock 302 with a 600 holley 4 barrel vac secondaries, electronic ignition if that helps.

Thanks in advance,

Coody
coody
Off Axis 5
Flightcraft Owner
 
Posts: 398
Joined: Wed May 06, 2009 12:00 am
Location: katanning, wa
Has thanked: 1 time
Been thanked: 11 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby 82Juddcraft » Sun Feb 07, 2016 12:15 am

coody wrote:Hi guys,

My boat has a 302 windsor and is running up to shite. Wont start at all without a pump or two and half throttle, once goine it appears to run quite well above 2000rpm. However drop the revs back to near 1000 rpm and it is rough as guts, any less revs and it just dies instantly. When trying to accelerate hard off the 1000 rpm make( as if you were pulling up a skiier, it coughs and farts out the top of the carb.

Have replaced all spark plugs, replaced the ignition coil- was getting red hot so thaught could have internal short but no different, checked firing order is correct, pulled bowl off carb, floats dont appear to be stuck and do seal up, couldnt see any in the jets.

At a loss now, can anyone shed any light on what to look for next?

Its a early 70's fairly stock 302 with a 600 holley 4 barrel vac secondaries, electronic ignition if that helps.

Thanks in advance,

Coody

Could be the distributors advance might be outta wack.
I just got mine reset for $100.
Be careful taking it out/in because you can muck up your timing if its not put back in correctly.
82Juddcraft
Raley
 
Posts: 247
Joined: Sat Jan 09, 2016 10:46 pm
Has thanked: 81 times
Been thanked: 14 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby lewy71 » Mon Feb 08, 2016 7:37 am

So it was running well then all of a sudden this problem developed?????

Could be numerous things:-

if you just had the carby or inlet manifold worked on I would say vacuum leak.

If you have had the distributor out it could be a timing issue.
User avatar
lewy71
Crow-Mobe
 
Posts: 934
Joined: Sat Dec 03, 2005 11:00 pm
Location: Tamworth
Has thanked: 1 time
Been thanked: 34 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby Alastair » Mon Feb 08, 2016 9:05 am

look in the top of the carby and pump the throttle, is there a good amount of fuel getting squirted? or is it piddling out? had a similar problem with my engine, i just rebuilt the carby and made sure i cleaned the needle and jets well. runs like a dream now.
Alastair
Tantrum
 
Posts: 118
Joined: Thu Jan 31, 2013 5:00 pm
Location: australia
Has thanked: 10 times
Been thanked: 9 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby 82Juddcraft » Mon Feb 08, 2016 7:03 pm

lewy71 wrote:So it was running well then all of a sudden this problem developed?????

Could be numerous things:-

if you just had the carby or inlet manifold worked on I would say vacuum leak.

If you have had the distributor out it could be a timing issue.

Yeah could be the seals in the valley of the block/intake manifold leaking
82Juddcraft
Raley
 
Posts: 247
Joined: Sat Jan 09, 2016 10:46 pm
Has thanked: 81 times
Been thanked: 14 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby mof » Mon Feb 08, 2016 8:34 pm

It's a long shot, but it doesn't have a flashlube dispenser for unleaded fuel in an old motor does it? Empty dispenser behaves like this.
User avatar
mof
Slurpee
 
Posts: 790
Joined: Tue Mar 08, 2005 11:00 pm
Location: Sydney
Has thanked: 4 times
Been thanked: 19 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby nevergrew » Tue Feb 09, 2016 7:01 am

Undo the retaining bolt on the dizzy and spin the body both ways slowly. If your idles improves its timing.

Also check fuel bowl levels.
User avatar
nevergrew
Ozmosis 7
Nautique Owner
 
Posts: 4210
Joined: Sat May 08, 2004 12:00 am
Location: Central Coast
Has thanked: 12 times
Been thanked: 87 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby coody » Tue Feb 09, 2016 9:31 pm

Thanks for the replies guys,

Bit of an update.

Went out the lake with it armed with timing light etc etc. after verifying the firing order was correct, we adjusted timing to approx 15 degrees BTDC. This made it run somewhat better, still rough and hesitation off idel.

Checked and adjusted idle mix jets, tried in many places never seemed to make a massive amount of difference, they are both set at 1 turn out.

Checked main jets were clear of in them, both are a 64 size.

Checked accelerator pump was squirting when stroked, good solid jet of fuel from there.

Checked needle and seat for proper sealing, it has an elec fuel pump and that was kicking out as it should and no overflowing fuel down the carb.
Checked float levels, they arent adjustable with a screw so checked where the seal up needle, would be about 3/4 full at a guess.
We even sprayed some flamable brake cleaner around the carb gaskets to see if it would rev up( sucking air) made no noticeable change in revs.

Pretty much at a loss now, going to do a compression test on it this weekend to be sure thats not our problem.
coody
Off Axis 5
Flightcraft Owner
 
Posts: 398
Joined: Wed May 06, 2009 12:00 am
Location: katanning, wa
Has thanked: 1 time
Been thanked: 11 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby Alastair » Wed Feb 10, 2016 2:37 pm

what do your plugs look like?
Alastair
Tantrum
 
Posts: 118
Joined: Thu Jan 31, 2013 5:00 pm
Location: australia
Has thanked: 10 times
Been thanked: 9 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby ski351 » Wed Feb 10, 2016 5:37 pm

Does the engine stall when the idle mixture screws are turned all the way in? (it should stall).
Does the idle smooth out if you partially choke the primaries?
What is the LIST number on the choke tower? 1850-13 ?
ski351
360
 
Posts: 134
Joined: Fri Oct 08, 2010 11:00 pm
Location: Brisbane
Has thanked: 0 time
Been thanked: 15 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby coody » Wed Feb 10, 2016 9:06 pm

Plugs are black as the ace of spades and were only new that morning.

Well it wouldnt really idle too much to even be able to see if it stalled when screwing them in
coody
Off Axis 5
Flightcraft Owner
 
Posts: 398
Joined: Wed May 06, 2009 12:00 am
Location: katanning, wa
Has thanked: 1 time
Been thanked: 11 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby ski351 » Wed Feb 10, 2016 11:52 pm

Sounds like it's flooding.
Remove the metering block and check that the power valve diaphragm is not ruptured and it's seated on the gasket. A leak here will pull un-metered fuel straight into the manifold.
ski351
360
 
Posts: 134
Joined: Fri Oct 08, 2010 11:00 pm
Location: Brisbane
Has thanked: 0 time
Been thanked: 15 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby 82Juddcraft » Thu Feb 11, 2016 6:42 am

Have ya tried new fuel? Could be as simple as water in the fuel tank.
82Juddcraft
Raley
 
Posts: 247
Joined: Sat Jan 09, 2016 10:46 pm
Has thanked: 81 times
Been thanked: 14 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby coody » Thu Feb 11, 2016 11:20 pm

Yeah mate its fresh, filled up that morning, use premium 95 in it.
coody
Off Axis 5
Flightcraft Owner
 
Posts: 398
Joined: Wed May 06, 2009 12:00 am
Location: katanning, wa
Has thanked: 1 time
Been thanked: 11 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby mof » Fri Feb 12, 2016 8:30 am

Did you confirm that the spark advances with rpm when you were shooting the timing light? If the dizzy advances the correct amount, you are better off setting all-in timing at around 2500 to 3000 rpm. Dunno what the right setting is for a 302 Windsor (google search) but setting the all in timing is probably more important.
User avatar
mof
Slurpee
 
Posts: 790
Joined: Tue Mar 08, 2005 11:00 pm
Location: Sydney
Has thanked: 4 times
Been thanked: 19 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby lewy71 » Sat Feb 13, 2016 12:19 pm

Set to 34 degrees at 2500-3000 is correct for the Ford Windsor
User avatar
lewy71
Crow-Mobe
 
Posts: 934
Joined: Sat Dec 03, 2005 11:00 pm
Location: Tamworth
Has thanked: 1 time
Been thanked: 34 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby coody » Sun Feb 14, 2016 10:21 am

Yeah did check the sprak advances, it is going the correct way, didnt get an accurate measure of what its going up to, we were setting the 15 degrees initial advance at around 1000 rpm.

I did have the carby off and broke the paper gasket, so rather than trying to re use it i used some hi temp silicone and made a silicone seal, i let it set for probably 3/4 hour. Could that be an issue?

Im concerned there may be a setting issue or something a miss in the carby so thinking i will send the carb off to a service centre.
coody
Off Axis 5
Flightcraft Owner
 
Posts: 398
Joined: Wed May 06, 2009 12:00 am
Location: katanning, wa
Has thanked: 1 time
Been thanked: 11 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby allycat » Sun Feb 14, 2016 4:20 pm

silican and petrol don t mix real well get a gasket its prably sucking air
allycat
Wake to Wake
 
Posts: 36
Joined: Wed Oct 03, 2012 5:58 pm
Location: dubbo nsw australia
Has thanked: 0 time
Been thanked: 6 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby nevergrew » Mon Feb 15, 2016 6:13 am

Yeah if you don't know your way around a carby or basic tune, give it to someone who is.
User avatar
nevergrew
Ozmosis 7
Nautique Owner
 
Posts: 4210
Joined: Sat May 08, 2004 12:00 am
Location: Central Coast
Has thanked: 12 times
Been thanked: 87 times

Re: 302 windsor / holley carb issues. PLEASE HELP!!

Postby mof » Mon Feb 15, 2016 1:19 pm

silicon will swell up and fail, and get sucked into your engine. Agree with nevergrew, take the boat to someone who knows their way around engine tuning.
User avatar
mof
Slurpee
 
Posts: 790
Joined: Tue Mar 08, 2005 11:00 pm
Location: Sydney
Has thanked: 4 times
Been thanked: 19 times

Next


  • Advertisement

Who is online

Users browsing this forum: No registered users and 15 guests