Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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Well, this post goes hand in hand kinda with my other post about my vaccum leak. After I reinstalled my distrib, the vaccum leak started and so did this quirky little starting problem. When I crank the engine with my foot off of the gas, if will turn over for about 2 turns, then the stall for half a second, turn again for about 1 turn, stall once more, then the engine fires right after that. BUT, the funny thing is, if I hold the accelerator to the floor, the damn things doesn't stall, 2 cranks and she fires right up! This has me confused and , haven't encountered anything like this at all. Right now, I haven't even a GUESS of what is causing this. Any suggestions would be helpfull.
Burnout
__________________ 1986 Firebird
SBC 350 LM1
Edelbrock RPM Air-Gap
Edelbrock Carb
Flowtech Shorty Headers
Mallory HEI Ignition
Accell 8.5mm Wires
Custom Single 3" Flowmaster 40 Series
Rebuilt 700R4
TCI Converter
Hi-Jacker Air Shocks
A/C and Smog Pump Removed
And Good 'ol 2.73's
Positive. I didn't even take the wires off of the cap, just the cap off of the base, and the base out of the block. 'Tink I woulda noticed a screwed up firing order!:sillylol:
Sounds more like a carb getting fuel problem to me. The first couple times is just getting it primed. Try pumping it some, then crank it over. I know when the weather got cold, I have to pump the h*ll outta my edelbrock 750. Here is mine when it is cold , pump about 50 times then crank it fires then quites. Pump about 30 times then crank, it runs for about 3 seconds, then last pump about 20 times and give it about 1/4 throttle and it fires up. But once the car warms up, it runs like you wouldn't believe.
__________________
84 camaro z28
350 .30 0ver
edelbrock 750 carb &
edelbrock performer rpm intake
edelbrock headers
480 lift comp cam
powertraxx performance locking rear
with 3-73 gears
BF Goodrich comp ta g-force kdws tires 245/50/16
accel super coil
polygraphite front suspension
lakewood lower control arms with lifter bars, lakewood panhard bar
heads are ported,decked, and have a 3 angle valve job
No emission system, the car does not run off the computer
flowmaster daul exhaust
50,30,20 pumps?:sillylol: I figure youd be outa gas by then!! I thought that also, but that all it takes to get started is 2 pumps. Even then, lack of fuel would make then engine turn over and over until there was enough present for it to start, and thats just my problem, it doesn't want to turn over consistenly. Maybe I should check my starter lead again, it IS close to my headers....
Originally posted by 385LT1 If you are referring to starting the engine 1st thing in the morning or first time of the day, or after the car has been sitting for awhile.
You will need to tap the gas pedal to set the choke.....
this could be why it starts when you push the gas pedal.
I am talking about after mine has set for like 24 hours. I can run it to work at 5 in the mornig, then when I come back out that evening it will fire right up. It is just after sitting for a while. Especially like after a weekend of lettin it sit around and driving the truck.
No, I'm not talking only about when I first start it up, it does it even when warm. At first I thought it was heat soak, but it did it when it was cold.
385LT1: What kind of carb do you have to automaticly set the choke by tapping the pedal?
Originally posted by bad84z I am talking about after mine has set for like 24 hours. I can run it to work at 5 in the mornig, then when I come back out that evening it will fire right up. It is just after sitting for a while. Especially like after a weekend of lettin it sit around and driving the truck.
cool, do you set the choke by tapping the gas once?
__________________
95 A.P.E. Z28, 6spd
385cid LT1
550rwhp 650rwtq
Best ¼mile time: 11.41@125mph (In Street Trim, 17's with Nitto's,1.9 60', shifting into 5th)
(Soon) Slicks, Skinnies,TH400 10.??@13?Mph
Originally posted by BurnoutBoogie Well, this post goes hand in hand kinda with my other post about my vaccum leak. After I reinstalled my distrib, the vaccum leak started and so did this quirky little starting problem. When I crank the engine with my foot off of the gas, if will turn over for about 2 turns, then the stall for half a second, turn again for about 1 turn, stall once more, then the engine fires right after that. BUT, the funny thing is, if I hold the accelerator to the floor, the damn things doesn't stall, 2 cranks and she fires right up! This has me confused and , haven't encountered anything like this at all. Right now, I haven't even a GUESS of what is causing this. Any suggestions would be helpfull.
Burnout
If I advance my timing to far it will do something similar. Turn over then act like the battery is dying, then turn over and start. Since you had the distributor out you might check the timing. Just a thought.
Originally posted by BurnoutBoogie No, I'm not talking only about when I first start it up, it does it even when warm. At first I thought it was heat soak, but it did it when it was cold.
385LT1: What kind of carb do you have to automaticly set the choke by tapping the pedal?
Burnout
A buddy has a Edelbrock 750 with an electric choke....
He tapps the gas once to set the choke.... turns the key and it fires right up into high idle... after sufficient heat in the engine has been built up.... it will kick down...... as they call it....
__________________
95 A.P.E. Z28, 6spd
385cid LT1
550rwhp 650rwtq
Best ¼mile time: 11.41@125mph (In Street Trim, 17's with Nitto's,1.9 60', shifting into 5th)
(Soon) Slicks, Skinnies,TH400 10.??@13?Mph
You know, I hadn't thought of this, but you have a mechanical and a vaccum advance on there dont you. Have you checked to make sure your weights have not gotten gummed up so they don't advance or you have you checked to make sure you havn't knocked your vaccum line off of the distributer or carb.