Q: What engines will fit into my 94 s10 blazer its a 4 door 2wd

asked by on February 25, 2017

I need a new engine for my s10 blazer i have a 98 f150 4.2 engine sitting around will that fit if not what will?

My car has 210000 miles.
My car has an automatic transmission.

If your VIN has a "W" or "Z" in it the 4.3L engine used in model year 1993 and 1994 will fit and function properly with your existing engine controls. You have to match the VIN to the engine, though, otherwise the PCM won’t work. No other engines will work with your present engine computer (PCM/ECM).


If you search at Car-Part.com you will find an EXACT match for your truck and lots of choices at various yards around the country. Engine swaps on modern computer controlled vehicles must be exact matches because if you attempt to use an engine that is not cataloged as a direct cross reference for your car or truck, you will find that the engine computers are not interchangeable. Consequently, even if you can get a "different" engine to physically fit, it won’t start and run. And, you cannot flash re-program your existing computer to work with a new engine because all of these engines use different computer hardware, that is physically different PCM’s. In addition, the engine wiring harnesses are completely different, and the TCM (transmission control module) will have to be completely changed as well. As if that isn’t enough, if and once you substitute a new PCM and TCM they won’t work seamlesly, if at all, with the other computers on the vehicle such as the body control module but there are many other microprocessors involved as well. In the modern era, really the only way engine swaps using non cataloged, non interchangeable engines can work is if you literally carry over all electronic controls and wiring that are associated with the engine and the vehicle to your vehicle. Obviously, that makes it very impractical and so few people do it. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Car starts, but no power to accessories and lights

The most likely cause is the ignition switch is binding. This is the electrical part in the steering column. I recommend you have a mechanic, like ones from YourMechanic, inspect the electrical components and verify the switch is the only...

The van stalls, jerks and hesitates

GM has a TSB out concerning clogged injectors that may cause all of the rough running/no start symptoms that you are experiencing. A professional fuel injector cleaning may help correct these various engine running issues. The procedure does require special...

Can I attach a camper to truck?

Whether or not you can attach a camper to your vehicle depends on your specific vehicle. Luckily, check inside the glove box for a large label. This is the ‘Loading Information’ label that will tell you if a slide-in camper...

Cylinder heads

If you only need a complete, re-manufactured cylinder head, that will be more economical than replacing the entire engine. On your car, replacing the cylinder head is 1/6th the cost of replacing the entire engine. There is one caveat though...

Fan is stuck can you still drive the car

You should not drive or run the vehicle if the cooling fan is not moving or the engine may overheat and cause severe damage. Have the cooling fan and fan clutch checked to make sure it is working properly. If...

Shifting problem?

What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent by vehicle...

Steering gear leaking

This is common in older vehicles. The input shaft has a seal and bushing that get worn over time. The typical repair is to replace the steering gear. If you vehicle is equipped with air bags, special precautions and procedures...

fuel pump doesnt fit in tank

Hello. I can only suggest you transfer the parts from the new pump to the old housing. If the parts look the same, it should work. To get tank size and year you would need to find the part number...

Killed the truck and now it will turn over, but it will not start

Hi, thanks for writing in. It sounds like the fuel pressure regulator is bad and leaking fuel into the engine. This can make the engine stall, smell of fuel, not start, or even crank if engine is flooded of fuel....

Related articles

How to Buy a Classic Chevy
For experienced car collectors and rookies alike, owning a classic Chevy is a rite of passage. There are multiple decades and styles in which Chevrolet made popular cars. Many of these cars then had a devout following in the years...
The Best Used Cars to Buy If You Live in a City
Living Living and driving in the city means you’re faced with parking constraints, narrow streets, and the constant stop and go of traffic. With all of that said when you’re ready to purchase a used vehicle these are all things...
2012 Chevrolet Impala vs. 2012 Toyota Camry: Which One Should I Buy?
In the battle for the family vehicle, the 4-door sedan is a strong contender that just continues to be a viable option even with the rise of the crossover SUV and the popularity of passenger vans. These sedans offer a...