Easy lifehacks

What causes a misfire on a 94 S-10?

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 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.

Where is the DLC on a GM 94?

Locate Data Link Connector (DLC), see image below. Turn Ignition switch to ON position. Count the flashes on the “ CHECK ENGINE ” or “ SERVICE ENGINE ” light. NOTE: Some 94 & 95 models do not have the B terminal. In which case a scanner is required.

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.

Is the GMC S-15 Jimmy a noisy car?

The S-15 Jimmy along with the S10 Blazer having the 4.3L Vortec engine have been known to become noisy as they get older. The brake pedals have been known to have a mushy feeling. Please include any external sites that were used in collaborating this data, including manufacturer sites, in this section.

Why do I get code 440 on my GMC Jimmy?

I own a 1996 GMC Jimmy. For the past 3 months, I regularly (once every 2 weeks?) get a engine warning light resulting in code 440. Initially, I was advised maybe it’s just a bad batch of fuel or tightness of fuel cap.

When did the GMC S-15 Jimmy come out?

The GMC S-15 Jimmy was introduced in 1983 alongside the similar Chevrolet S10 Blazer .It was made to go along with the GMC S-15 pickup that was introduced in 1982 with the Chevrolet S-10 pickup. The S-15 Jimmy was introduced in 1983 alongside with the Chevrolet S10 Blazer.

What kind of problems does a 1993 Jimmy have?

I have a 1993 Jimmy. It has been having starting issues. We have heard everything from the fuel injectors needs to be cleaned to replacing the water pump. We have replaced the computer twice, the second time the garage replaced it free. But now it does not start but turns over.

Where was the ignition located on my 93 S-10 Blazer?

My old 93 S-10 blazer had an internal Ignition Module, inside the bottom of the distributor. I know this much, if those little PIA’s start winking out, you will see all kinds of issues similar to what you are describing.

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.

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.

My old 93 S-10 blazer had an internal Ignition Module, inside the bottom of the distributor. I know this much, if those little PIA’s start winking out, you will see all kinds of issues similar to what you are describing.

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.

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Ruth Doyle