4.3 vortec hesitation

Common Problems A common complaint with the Chevy 4.3 engine is that it doesn't idle well, it's loud and makes awkward noises. Examples of this are staling, lurching and poor acceleration. Poor idling and loud engines usually go hand-in-hand. Sep 04, 2018 · GM power piston spring p/n 7037305 is set for a tip in point of ~6 in/Hg, and would work well with a high vacuum, smooth idling and/or wide LSA type cam. GM PP spring p/n 7036019 has a tip in of about 8 in/Hg. GM part #7029922 is a rather weak spring that was OE for HO Pontiac engines from the early ‘70s. After replacing everything and taking my 2001 silverado 4.3 to my local mech. and the local chev. dealer with no answers and mucho dinero later i came across a service bulletin from GM stating that from 96-2002 there has been an ongoing problem with the valves sticking on 4.3, 5.0, and 5.7 vortec engines while towing or going up a grade.gm TBI 4.3 hesitation misfire occasional backfire. Jump to Latest Follow 1 - 16 of 16 Posts. D. Donovan91 · Registered. Joined Apr 5, 2012 · 222 Posts . Discussion ... Dec 13, 2010 · 1994 S-10 4x4 pickup, 4.3L, VIN W. 215,000 on the truck, 40 or so on a GM crate engine. A week or 2 ago the truck started missing and surging anywhere but idle or wot. Aug 22, 2007 · Happened with our 2000 4.3L vortec blazer. If it almost feels like its flooding its probably the Mass Air Flow sensor (MAF) Took it to a few different mechanics and couldn't figure it out, tried lookin for anything spark or fuel untill we hit the MAF so try that and hopefully you'll save yourself the time and Money of everything else After replacing everything and taking my 2001 silverado 4.3 to my local mech. and the local chev. dealer with no answers and mucho dinero later i came across a service bulletin from GM stating that from 96-2002 there has been an ongoing problem with the valves sticking on 4.3, 5.0, and 5.7 vortec engines while towing or going up a grade. My 1999 Chevy S-10 With A 4.3 Vortec Hesitates Unless You Hold The Fuel Pedal To The Floor, Code Reads Low Voltage To O2 Sensors. ... I Have A Bad Hesitation The ... Re: 4.3 v6 hesitates when full throttle applied This may or may not be a carb issue. On my 1996 VP 4.3L I had a bad module in the distributor that caused this problem. The problem was not the carb but the advance was way off. It caused hesitation and backfiring pops on hard acceleration. Vortec is a trademarked name for a line of engines for General Motors trucks.The name first appeared in an advertisement for the 1985 model year 4.3 L V6 that used "vortex technology" to create a vortex inside the combustion chamber, creating a better air/fuel atomization. Jul 06, 2020 · 2007 GMC Yukon, Yukon Denali, Yukon XL Denali, Yukon XL with 5.3L or 6.0L Vortec V8 Engine GMC Factory Service Bulletin OBDII Code P0300 2000-2018 GMC All Models Jul 27, 2020 · While the Gen IV Vortec engine line is still in production today, Chevy launched the new EcoTec3 engine line as the successor or Gen V to the Vortec in 2014. The 6.2L EcoTec3 is the small-block V8 that powers the majority of Chevy’s performance vehicles, such as the Corvette C7’s and Camaro SS vehicles. My 1999 chevy s-10 with a 4.3 vortec hesitates unless you hold the fuel pedal to the floor, code reads low voltage to o2 sensors. I've replaced all 3 o2 sensors, new plugs, wires, distributor cap, rooter Button, throttle control sensor, themperature control sender, and took the egr valve off and cleaned it out.The 4.3 Vortec engine (or Vortec 4300) is a 6-cylinder small-block that was introduced in 1985 and continued in production until 2014. Over its nearly 30 year production history the 4.3L Vortec went through a number of revisions and upgrades: LB1 (1985-1986 primarily in C/K trucks)Slight Hesitation on Acceleration; Several Diagnostic Checks. [Symptom:] Slight hesitation on acceleration. [Diagnosis 1:] Check the health of the knock sensor. It is an inexpensive part that "listens" to the engine, senses knock and automatically retards the timing. They get full of crud etc. and give false information. Jan 19, 2006 · 4.3 vortec v6 harmonic balancer. can you change a 4.3 harmonic balancer , ( 1996 oem) with a 350 one ? thanks dave ... « GMC stumble/hesitation..please help ... My 1999 chevy s-10 with a 4.3 vortec hesitates unless you hold the fuel pedal to the floor, code reads low voltage to o2 sensors. I've replaced all 3 o2 sensors, new plugs, wires, distributor cap, rooter Button, throttle control sensor, themperature control sender, and took the egr valve off and cleaned it out.This helps to eliminate any vehicle roll aways. GM Recall #50491 or 50490; Windshield Wipers May Become Inoperative– The wiper motors have a faulty ball joint, which can cause the wipers to fail at any time. It may affect one or both wipers. GM Recall #25302 If the fuel mixture becomes too lean, "lean misfire" may occur as the load on the engine increases. This can cause a hesitation, stumble and/or rough idle problem as well. The air/fuel ratio can also be affected by changes in altitude. As you go up in elevation, the air becomes less dense. I just got a “Customer Satisfaction Program” letter from GM stating that GM’s 3.6 liter V6 (the engine used in the Camaro, Saturn Outlook, LaCrosse, Cadillac CTS, and several other cars) is showing premature wear of the timing chain. A quick check of the web turns up that many who own this engine are experiencing troubles all the way up to the engine fragging. GM is offering to “change ...
Jul 16, 2014 · After cleaning the throttle body on a GM vehicle, you may need to perform a throttle/idle relearn. Performing a throttle relearn on GM throttle-by-wire vehicles can easily be done with the Mac Tools Mentor Touch Scout, No. ET6100. For example, to perform a throttle relearn on a 2008 Silverado 5.3L, select and run the Idle Learn Reset test.

The 4.3 Liter Vortec engine is built by General Motors. This is a V6 engine that has had a long history, although much has changed along the way. The 4.3L Vortec built today is certainly significantly different from the original Vortec first offered in the mid-1980s. The list of cars that have used the 4.3L Vortec is a long one. This engine has ...

Re: 4.3 v6 hesitates when full throttle applied This may or may not be a carb issue. On my 1996 VP 4.3L I had a bad module in the distributor that caused this problem. The problem was not the carb but the advance was way off. It caused hesitation and backfiring pops on hard acceleration.

Vortec 4300 4.3L V6; Forum main. FAQ; Hesitation/low power. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. Hesitation/low power. Aug 23 2012, 2:24am. Hey guys. Sorry for my first post being about a problem, but this one has me pulling my hair out. I have a '95 Silverado RCSB 4.3/5-Speed with 177k miles. The truck runs great and actually ...

Jul 19, 2012 · Sandy, Thank you very much for your help. I am courrently analyzing the last parameter scan i took. In addition i will run and record parameters on the other engine (works fine) at predetermined load conditions ( throttle %) and rpm ( ie 1000 - 2000 - 2500 - 3000 - 3500 rpm).

Dec 05, 2020 · Engine Misfire or Rough Engine Idle on GM 4.8L, 5.3L, 6.0L is becoming; more common and getting harder to diagnose. Because, GM V8 engines are very prone to a rough idle and engine misfire when cold. The check engine light may also come on, with codes P0300, P0171 and PO174.

Hi, 1994 S10 Blazer 4.3 vortec vin W. so I replaced the fuel rail and feed and return lines under the plenum as was suggested by you guys. ... 94 s10 w/ 4.3 vortex. hesitates during VERY slow acceleration. basically only the 1st 1/4 to 1/2 inch of peddle movement is involved. At idle and it is fine. full throttle acceleration is fine.

Our 4.3 liter 262 Vortec Long Block Crate Engine is on sale. In the mid-90s the 4.3 Vortec hit the market and soon after the motors popularity grew until it could be found in Vans trucks and SUVs like the Chevy Astro, Blazer, Express, S10, Silverado, GMC Jimmy, Safari, Savana, Sierra, Sonoma, Isuzu Hombre and Oldsmobile Bravada just to name a few.

The 4.3 Vortec engine (or Vortec 4300) is a 6-cylinder small-block that was introduced in 1985 and continued in production until 2014. Over its nearly 30 year production history the 4.3L Vortec went through a number of revisions and upgrades: LB1 (1985-1986 primarily in C/K trucks)The pistons/rings/timing chains issue on the GM 2.4L Ecotec is far worse (We see 3-4 a week) and nobody talks about that one. The new body style 2014+ trucks have more issues with the AFM. They like to break valvesprings. Sep 19, 2007 · > >I have a 2000 chevy blazer 4x4 4.3 liter with California emmisions. I > >am having a problem with a tip in hesitation. That is as soon as you > >step on the pedal to accelerate the engine hesitates or misfires and > >then clears up. It seems to happen only when the engine is cold and > >once its warms up to operating temp it is gone. 96 S-10 v6 4.3 vortec. Misfiring at cruising speed or at intermittent times. And I get a low voltage tps code.. I've replaced; new plugs and wires, dist. cap and rotor, Ignition coil, Throttle Position Sensor, TPS adapter (soldered the wires), MAF sensor, PCV valve, EGR valve/gasket (replaced with a used one). Running out of ideas, and have ...See and discover other items: 4.3 vortec engine, gm truck, 98 chevy 5.7, 98 silverado, parts for 98 gmc suburban, 1998 chevy silverado parts There's a problem loading this menu right now. Learn more about Amazon Prime.