if timing is set too fast will engine shut down?
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
if timing is set too fast will engine shut down?
if i set the timing too fast... will the engine turn off?
i noticed it was set at like 8-10btdc with est wire off and egr leak (in park). it runs fine.
i fixed egr leak, it now starts then turns off.
plug est wire back in and move distributor back 4 degrees or so, and now it runs fine again.
also... what is that hissing sound coming out of my engine block now, is that IAC valve letting air in?
i noticed it was set at like 8-10btdc with est wire off and egr leak (in park). it runs fine.
i fixed egr leak, it now starts then turns off.
plug est wire back in and move distributor back 4 degrees or so, and now it runs fine again.
also... what is that hissing sound coming out of my engine block now, is that IAC valve letting air in?
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
There is a large vacuum leak somewhere.
That is likely the reason why the engine idle quality is so bad & you can't accurate set the base ignition timing jumping allover the place when you are trying to set it.
They clue you gave me was a hissing sound.
That is the tell tale sound of a large vacuum leak.
Check & make sure the power brake booster vacuum line is plugged in.
And the same vacuum line has no cut of breaks in it.
If using the PCV valve, make sure the vacuum line to it is OK also
That is likely the reason why the engine idle quality is so bad & you can't accurate set the base ignition timing jumping allover the place when you are trying to set it.
They clue you gave me was a hissing sound.
That is the tell tale sound of a large vacuum leak.
Check & make sure the power brake booster vacuum line is plugged in.
And the same vacuum line has no cut of breaks in it.
If using the PCV valve, make sure the vacuum line to it is OK also
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
Get the engine running and use a propane torch to locate the leak. When the propane gas is induced to the vacuum leak it will idle noticibly higher.
ps: it would be best to do this while the torch is unlit
ps: it would be best to do this while the torch is unlit
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
There is a large vacuum leak somewhere.
That is likely the reason why the engine idle quality is so bad & you can't accurate set the base ignition timing jumping allover the place when you are trying to set it.
They clue you gave me was a hissing sound.
That is the tell tale sound of a large vacuum leak.
Check & make sure the power brake booster vacuum line is plugged in.
And the same vacuum line has no cut of breaks in it.
If using the PCV valve, make sure the vacuum line to it is OK also
That is likely the reason why the engine idle quality is so bad & you can't accurate set the base ignition timing jumping allover the place when you are trying to set it.
They clue you gave me was a hissing sound.
That is the tell tale sound of a large vacuum leak.
Check & make sure the power brake booster vacuum line is plugged in.
And the same vacuum line has no cut of breaks in it.
If using the PCV valve, make sure the vacuum line to it is OK also
the break booster line might possibly be it. i noticed that valve that sits into the booster is a little loose... also i noticed, that before I pust the EST wire back in and backed off timing, when I put my foot in break the engine rpm would dip a little. after I played with timing and put est wire back in that problem went away.
thanks again btw.
thanks again guys!
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
Fix the large vacuum leak whatever & where ever it may be on your engine - Vette 1st before you attempt to do anything else.
I see you took my advice last night.
You are still around today.
Thank God You listened to me.
Getting run over by any car sucks.
By your own Corvette ?
LOL
Brian
I see you took my advice last night.
You are still around today.
Thank God You listened to me.
Getting run over by any car sucks.
By your own Corvette ?
LOL
Brian
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
Fix the large vacuum leak whatever & where ever it may be on your engine - Vette 1st before you attempt to do anything else.
I see you took my advice last night.
You are still around today.
Thank God You listened to me.
Getting run over by any car sucks.
By your own Corvette ?
LOL
Brian
I see you took my advice last night.
You are still around today.
Thank God You listened to me.
Getting run over by any car sucks.
By your own Corvette ?
LOL
Brian
im going to find a cold beer... and then keep tinkering with this....
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
That little plastic valve will move a bit it just sits in a rubber grommet is all.
Make sure the booster itself isnt cracked and leaking you do need your egr valve. Keep timing at stock setting too.
As others said spend time looking for vacuum leaks youll get it nailed down.
Make sure the booster itself isnt cracked and leaking you do need your egr valve. Keep timing at stock setting too.
As others said spend time looking for vacuum leaks youll get it nailed down.
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
That little plastic valve will move a bit it just sits in a rubber grommet is all.
Make sure the booster itself isnt cracked and leaking you do need your egr valve. Keep timing at stock setting too.
As others said spend time looking for vacuum leaks youll get it nailed down.
Make sure the booster itself isnt cracked and leaking you do need your egr valve. Keep timing at stock setting too.
As others said spend time looking for vacuum leaks youll get it nailed down.
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Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
First of all find the vacuum leak.
Next, you are setting the timing incorrectly for an automatic. You need to block the wheels (block all four to be safe), set the parking brake. Unplug the single brown wire...and put the transmission in DRIVE. Set your timing....don't goose the throttle or you might jump the blocks. Standard setting is 6 degrees, but individual cars may run better using 8-10 degrees.
find the vacuum leak.Next, you are setting the timing incorrectly for an automatic. You need to block the wheels (block all four to be safe), set the parking brake. Unplug the single brown wire...and put the transmission in DRIVE. Set your timing....don't goose the throttle or you might jump the blocks. Standard setting is 6 degrees, but individual cars may run better using 8-10 degrees.
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
Replace them with Fel-Pro's #1204, #1205, #1206, #1207.
Exact number gaskets depends upon Heads & Intake on your stroker sbc.
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
The intake gaskets shrunk- cracked likely from your Vette sitting for 6 years while you were off in College Chasing women & Drinking Beer.
Replace them with Fel-Pro's #1204, #1205, #1206, #1207.
Exact number gaskets depends upon Heads & Intake on your stroker sbc.
Replace them with Fel-Pro's #1204, #1205, #1206, #1207.
Exact number gaskets depends upon Heads & Intake on your stroker sbc.
I ordered a gasket kit for the SR a week or two ago, for when I put new injectors in.
Last edited by mistaben; Aug 17, 2011 at 10:42 PM.
Safety Car
Joined: Jan 2004
Posts: 3,759
Likes: 8
First of all find the vacuum leak.
Next, you are setting the timing incorrectly for an automatic. You need to block the wheels (block all four to be safe), set the parking brake. Unplug the single brown wire...and put the transmission in DRIVE. Set your timing....don't goose the throttle or you might jump the blocks. Standard setting is 6 degrees, but individual cars may run better using 8-10 degrees.
find the vacuum leak.Next, you are setting the timing incorrectly for an automatic. You need to block the wheels (block all four to be safe), set the parking brake. Unplug the single brown wire...and put the transmission in DRIVE. Set your timing....don't goose the throttle or you might jump the blocks. Standard setting is 6 degrees, but individual cars may run better using 8-10 degrees.
Burning Brakes
Joined: Feb 2010
Posts: 1,013
Likes: 2
From: California City Ca
CHECK for any all open sparks before doing this I did the same trick with Carb cleaner when I heard a bang and car was on fire I lucked out and blew it out with the car still running I was on the Passenger side in the garage by my self I was luck I did not burn down the house. (The wife would been PO).
Make sure it dark real dark start the car up before you try propane or carb cleaner and see if you can see any sparks trust me on this one.
Make sure it dark real dark start the car up before you try propane or carb cleaner and see if you can see any sparks trust me on this one.
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
CHECK for any all open sparks before doing this I did the same trick with Carb cleaner when I heard a bang and car was on fire I lucked out and blew it out with the car still running I was on the Passenger side in the garage by my self I was luck I did not burn down the house. (The wife would been PO).
Make sure it dark real dark start the car up before you try propane or carb cleaner and see if you can see any sparks trust me on this one.
Make sure it dark real dark start the car up before you try propane or carb cleaner and see if you can see any sparks trust me on this one.
standback, and squeeze handle lightly
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
my understanding is dropping it into drive, from park, drops the engine rpm by about 150 - 200 rpms because of the added load. - you set the timing with the engine in drive, /w ebrack on, in an automatic. to get a similar timing on the detonation of the cylinder you have to advance the timing by about a few degrees to get it to set in park w/ no load because (usually) the engine picks up a few 150-200rpms.
*shrugs* in all honesty my engine idles at 600rpm in park or in drive.
*shrugs* in all honesty my engine idles at 600rpm in park or in drive.
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
my understanding is dropping it into drive, from park, drops the engine rpm by about 150 - 200 rpms because of the added load. - you set the timing with the engine in drive, /w ebrack on, in an automatic. to get a similar timing on the detonation of the cylinder you have to advance the timing by about a few degrees to get it to set in park w/ no load because (usually) the engine picks up a few 150-200rpms.
*shrugs* in all honesty my engine idles at 600rpm in park or in drive.
*shrugs* in all honesty my engine idles at 600rpm in park or in drive.
Good way to get killed.
Like playing Russian Rollette' with a .44 magnum Revolver & 5 bullets in the chamber.
Watch the other guy load 5 bullets in with 1 empty.
Spin the revolver shut.
Point it at your head & face.
Pull the trigger.
You tell me what the odds are that you could die or not.
Another good way you can kill yourself is jump off a Freeway overpass like in Chicago off of I-55 than runs in & out of the City.
Time it just right & Jump off right in front of a MACK Semi tractor & trailer attached.
Hope the semi driver will stop in time along with all other traffic.
Or you can go to O'hare air port wait for a 747 Jet plane to start its engines.............
Wait for the jumbo jet engines spin up to speed full throttle & jump in front of the fan - air compressor intake just 2 feet away.
See if you get sucked in like a Bird or not.
Stupid is what stupid was.
Just Now Dead.
Last edited by 87 vette 81 big girl; Aug 18, 2011 at 02:27 AM.
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
Stupid Idea.
Good way to get killed.
Like playing Russian Rollet with a .44 magnum Revolver & 5 bullets in the chamber.
Watch the other guy load 5 bullets in with 1 empty.
Spin the revolver shut.
Point it at your head & face.
Pull the trigger.
You tell me what the odds are that you could die or not.
Another good way you can kill yourself is jump off a Freeway overpass like in Chicago off of I-55 than runs in & out of the City.
Time it just right & Jump off right in front of a MACK Semi tractor & trailer attached.
Hope the semi driver will stop in time along with all other traffic.
Or you can go to O'hare air port wait for a 747 Jet plane to start its engines.............
Wait for the jumbo jet engines spin up to speed full throttle & jump in front of the fan - air compressor intake just 2 feet away.
See if you get sucked in like a Bird or not.
Stupid is what stupid was.
Just Now Dead.
Good way to get killed.
Like playing Russian Rollet with a .44 magnum Revolver & 5 bullets in the chamber.
Watch the other guy load 5 bullets in with 1 empty.
Spin the revolver shut.
Point it at your head & face.
Pull the trigger.
You tell me what the odds are that you could die or not.
Another good way you can kill yourself is jump off a Freeway overpass like in Chicago off of I-55 than runs in & out of the City.
Time it just right & Jump off right in front of a MACK Semi tractor & trailer attached.
Hope the semi driver will stop in time along with all other traffic.
Or you can go to O'hare air port wait for a 747 Jet plane to start its engines.............
Wait for the jumbo jet engines spin up to speed full throttle & jump in front of the fan - air compressor intake just 2 feet away.
See if you get sucked in like a Bird or not.
Stupid is what stupid was.
Just Now Dead.
- for what it's worth, I have mine on blocks - it lurching forward is a non issue(in theory), and I still do it in park.