MikeZ28

iTrader: (1)

when im driving in 2nd gear i will take the engine all the way to 4500rpms then it will just cut out on me like it doesn't want to go any higher and gives out. the engine is a 350. does this sound like the carb is giving out or what other problems could it be?
thanx

Jester

In general problems like that aren't the carb. Either timing, valve float, or inadequate fuel delivery (pump).

It would probably be helpful if you went into more detail than "It's a 350" and what you mean by "give out"

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"American made baby. 100% American iron. The muscle among the masses. My hero. Yep, you can take your ergonomically designed, space age, computer controlled, 4 door, cup holding map lighted split double wishbone split fold down retractable cargo covered moon roof piece of transportation and keep it. For I have felt the thunder. And I know the difference!"
JSP Motorsports
ICON Motorsports

MikeZ28

iTrader: (1)

when i say give out i mean i will go into second gear and mash it and take it up to 4500rpms and then like it wouldn't go to 5000rpms it just like cuts off or something it loses power and i have to shift i can't go to 5000rpms like i want to. it never used to do this b 4. i just took it out of storge it has been sitting like 9 months is it possible it could be the gas. it just doesn't want to keep on climbing the rpm range it is fine till i get to like 4-45k then it just like stops climbing any ideas?

Jester

If the gas is 9 months old..yeah that would definatly be a good place to start. As would new a fuel filter. and oil/oil filter...just in case you havn;t yet.

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"American made baby. 100% American iron. The muscle among the masses. My hero. Yep, you can take your ergonomically designed, space age, computer controlled, 4 door, cup holding map lighted split double wishbone split fold down retractable cargo covered moon roof piece of transportation and keep it. For I have felt the thunder. And I know the difference!"
JSP Motorsports
ICON Motorsports

MikeZ28

iTrader: (1)

ill try a fuel filter. i already did the oil change and coolant. thanx for the help

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350 vette engine
aluminum heads
235/60R15 BFgoodriches
3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt sony amp

87RS402

Ya, that sounds like the fuel filter is restricting the flow. I used to have the same prob. I replaced the filters with a cleanable screen type and a regular one for the smaller particles.

MikeZ28

iTrader: (1)

would the filter be getting clogged and just making less gas get through. would that stop the flow of gas because it is clogged and not give the sufficent amount of gas to keep on going through the higer rpm range?

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350 vette engine
aluminum heads
235/60R15 BFgoodriches
3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt sony amp

bottledpower

absolutely. it could be supplying enough gas for lower rpms, but chocking off the supply at high rpms.

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85 IROC 350 11:1keith blacks,.555lift erson roller cam,1.5 crane roller rockers,edelbrock intake,holley 4150 750dbl pumper, nitrous oxide,full length heddman headers,true dual exhaust, 11"stall converter, 700R4, 3.73 locker

MikeZ28

iTrader: (1)

thanx alot guys for all your help!!!!!!

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350 vette engine
aluminum heads
235/60R15 BFgoodriches
3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt sony amp

MikeZ28

iTrader: (1)

what kinda fuel filter should i get and what do they usually cost?
thanx in advance.

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350 vette engine
aluminum heads
235/60R15 BFgoodriches
3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt sony amp

five7kid

iTrader: (14)

If you're talking about the stock q-jet, any parts store will have an in-carb filter that will work fine. A couple of bucks or so.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere w/open diff & slipping tranny.

FastBroker

Maybe your secondaries are "stuck" closed, if they are vac operated? and/or secondary fuel system is (partially) clogged from fuel varnish?

[This message has been edited by FastBroker (edited May 03, 2001).]

MikeZ28

iTrader: (1)

i don't think that they are closed because i can hear them open up when i go WOT but it just cuts off. it does sound like the fuel filter to me it is like more than a year old maybe 2.
thanx anyway


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350 vette engine
aluminum heads
235/60R15 BFgoodriches
3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt sony amp

Big454blockchevy

Not to long ago I had the same problem on my Nova. It turned out that the fuel pressure needed to be adjusted. It was set at 4 so I moved it up a little and the problem went away. Sounds like fuel delivery problem.

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Big 454 72 Chevy Nova
383 86 Camaro Z28
10.5:1compression 186 casting Heads,234dur.488lift exh&int,Edelbrock performer intake, Holley750 vac.sec 400 crank,flat top pistons,edelbrock valve springs and lifters,tranny shift kit,2500 stall converter. Will install 3.73's later on and might go with a more aggresive cam.As of 4/01 added Hooker Headers,2.5inchpipes with 40 s. Flowmasters.Ignition upgrade include: MSD Coil and MSD module.

350HOZ28

Sounds like fuel pressure or fuel filter most likely. Another option could be the ignition system isn't keeping up with the car at that high of rpm's, and there isn't enough spark to ignite that much gas at WOT. I also doubt it is the carb. I have a Q-Jet and am pushing 400+ HP right now with minimal problems. It is slightly modified on the secondary side though.

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Formerly known as 1984L69Z28

1984 Z28 - L69 optioned, 350HO w/ Trick Flow Heads, Drop Forged Lunati Crank, Crane Cam and 1.5 Roller Rockers, Stock Z28 Intake Manifold, Highly Tweaked Rochester Carb(700cfm), K&N Filter, ThermoMaster Chip w/ 160 Stat, Comp Headers, 3" Stainless Dual Exhaust w/ no Cat & Dynoflow Muffler, 4 wheel disc brakes, etc....

God bless us father, son, and holy ghost....whoever goes the fastest wins the most!!

MikeZ28

iTrader: (1)

I have an electric fuel pump so i would i go about changing the fuel pressure. i am first gonna try and change the filter first and see what happenes if the problem is still there im gonna get a different fuel pump i guess

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86 Z28:
350 vette
aluminum heads
T-5
235/60R15 BFgoodriches
dual 3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt Sony xplod amp
Sony xplod deck
K&N air filter