Gaining 50 ponies and, more importantly, 70 lb-ft of torque, would help the S10 and the S15 add a new dimension of utility to the mix. Previously, their respective small pickups had been restricted to the rought-and-tumble 2.8L version of the previous-generation GM six-cylinder, which provided a mere 110hp when the model launched. This was an important move for Chevrolet and GMC. It was around this time that the smaller members of the Chevrolet and GMC truck family-the compact S10 and S15 pickups, as well as their Blazer and Jimmy equivalents-would graduate to the 4.3L V6. The following year throttle-body models would gain an extra 10 horsepower, and by 1987 the truck version of the 4.3 had graduated to a 160hp version of the same fuel injection setup. For a time, even the El Camino would feature a 4.3L option.
A throttle-body injection system was also available in a less-impressive 130hp LB4 tune in full-size cars like the Chevrolet Caprice and the Monte Carlo coupe, as well as their Pontiac (the Parisienne and Grand Prix) equivalents. Initially, the carbureted LB1 unit was rated at 155hp and 230 lb-ft of torque, and would be offered in Chevrolet and GMC full-size pickups as well as vans. The larger bore of the 4.3 would help it push past previous GM V6 engines in terms of performance. GM also began to advertise a new air/fuel mixing method using a 'vortex' inside the combustion chamber that it would brand 'Vortec.' Eventually, all of GM's truck motors would fall under the 'Vortec' banner that the 4.3 was introduced under. The engine was converted to an even-fire setup, matching that of the V8, with an external balancer. There were a few key differences that separated the 4.3 from previous GM V6s. This would allow the entire family of engines to move forward and evolve together through time, and the motors even shared the same main bearings, cam bearings, pistons, and valvetrain. This was an inspired decision on the part of the General, as not only did it have almost a quarter of a century of experience with the small block's architecture (including production, design, and maintenance), but it also linked the V6 to the V8 in terms of design. That's because its bore and stroke are a perfect match for the 350 cubic inch version of Chevrolet's legendary small block V8, leading some to call the six-cylinder a '3/4' version of the SBC. The Old, Familiar FeelingĪt first glance, the specs on the 4.3 V6 feel familiar. What made the 4.3L V6 such an enduring engine, and one that still today has thousands of dedicated enthusiasts working together to support a thriving community? The answer lies in GM's clever decision to build on its past success by bridging the old and the new in a simple, yet well-engineered solution. The Chevrolet/GMC 4.3L V6, which first appeared in 1985, became the backbone of the automaker's small truck and SUV lines, and it would continue to evolve for the next three decades as engine controls and designs became increasingly sophisticated. While the small block Chevy and its LS successor might get all of the glory, there's another motor from General Motors that deserves just as much praise in the truck world. Note: on 1995 and newer models, disconnecting the EGR from the wiring harness (common on R&R) may require the computer to be reprogramed.The History Of GM's 4.3 Vortec V6, The King Of Compact Truck Motors
1994 chevy truck s 10 pick up v6 4.3l install#
Install the gasket between the EGR and the exhaust manifold and you should be good to go. I don't remember the name of the product, but a search for "EGR filter gasket" may lead you to the product.
What I found that gave me a permanent solution was an aftermarket filter gasket that keeps debris from clogging. I must have did this at least three or four more times. Three days later, the same "check engine" and same rough idle. I removed my egr and then dislodged the sediment (pea-sized debris) and then re-installed the valve. When the valve is open when it should be closed, the engine runs very rough. What happens is sediments from the exaust manifold get sucked up into the valve when it opens, then stick in the valve and keep it from closing. Symptoms are rough idle, and surging and stalls.
1994 chevy truck s 10 pick up v6 4.3l code#
If you have a dashboard indicator showing "check engine" most likely it is a trouble code indicating and EGR (exhaust gas recirculator) valve problem. This make/model has a chronic problem with EGR clogging.