What kind of engine does a 1994 S-10 have?
1994 S-10 4×4 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.
What kind of engine is in a Chevy S10?
Because the Chevy S10 has practical hardware, you can use components that are designed for other automobiles to power an S10 truck. Hardware for GMC vehicles manufactured in 2003 with 4.3-liter components can be used with an S10, and 1996 Blazer items are suitable for a Chevy S10 as well. The 2003 Sonoma also has hardware that fits the S10 pickup.
What causes a misfire on a 94 S-10?
Typically if the lower intake gasket leaks vacuum, it only affects one cylinder and causes a noticeable misfire all the time. On your engine, the ECM batch fires the injectors, it can not richen the mixture for individual cylinders.
How often does a 94 S-10 4.3 drop rpm?
After you take it out and drive it, it’ll idle fine for a couple minutes, then will drop a couple hundred rpms every 30 seconds or so for just a count, then back to normal. Any ideas? I’m pulling my hair out.
How is my 1994 S-10 4.3 running?
Starts fine, even today when it was -15, fuel pressure 52 running, holds after shut down, newer plugs/wires/cap rotor, tested MAP sensor and tests good, tested resistance changes in TPS (with sensor out) and changes were smooth along range, unplugged every sensor I could find individually looking for changes, no luck.
After you take it out and drive it, it’ll idle fine for a couple minutes, then will drop a couple hundred rpms every 30 seconds or so for just a count, then back to normal. Any ideas? I’m pulling my hair out.
Typically if the lower intake gasket leaks vacuum, it only affects one cylinder and causes a noticeable misfire all the time. On your engine, the ECM batch fires the injectors, it can not richen the mixture for individual cylinders.
When did Vortec start using CSFI fuel injection?
The system was used on 4.3L V6 Vortec engines through 1995, and was redesigned in 1996 and renamed “Central Sequential Fuel Injection” (CSFI). The system was also added to 5.0L and 5.7L Vortec V8 engines.