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V6-4.3L

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Hard to start
Check cylinder compression and also check for exhaust restrictions (use a gauge to measure back pressure). If no problem is found, cleaning the injectors is not a bad idea but such has to be done off the vehicle (by commercial...
Question
How much to replace intake manifold gasket on 1999 chevy astro van 4.3 engine?
On your model, it probably takes around 4 hours to replace both the upper and lower intake manifold gaskets but if you have rear A/C it is somewhat longer. A gasket kit is necessary because other gasketed parts are removed...
Question
I have a 93 chevy astro and im not getting spark to from my ignition coil
There is a problem on the primary side of the ignition circuit. If your distributor was not replaced and contains a Hall effect pick-up assembly that can be tested using a self powered “indicator light” that is made for this...
Question
. Goodmorning. Prior to r
Backfiring is often caused by a too lean or too rich air-to-fuel ratio although a few other causes are discussed below. A backfire in the intake manifold is caused by a ratio that is too lean (not enough fuel). A...
Question
My truck will not start, it is getting fire all cylinders but no luck starting it! What can you tell me to look for?
Hi there. On mid-90's V-6 engines, the problems with starting are typically caused by fuel flow restrictions. In many cases, its the fuel pump or fuel pump relay that is faulty or broken. Another possibility is that the fuel filter...
Question
Blazer wont turn over
You may have a leaking injection system and has filled one of the cylinders with fuel and caused engine to lock. You should check the engine oil to see if it is full of fuel and also remove all the...
Question
All my light work when truck off start truck all lights work except headlights go out
If the headlights are working intermittently (i.e., turn off after you start the truck), there is a loose connection, faulty relay or switch, or other electrical problem in the headlight circuit. When the problem occurs, you can find the fault...
Question
How much does it roughly cost to fix the p0304 code on a 2000 gmc Jimmy
Hi there. The cost of the repair would depend on the problem that is causing the misfire on the #4 cylinder. It can be as simple as needing a new spark plug to as expensive as an engine rebuild if...
Question
Fuel pump
Fuel line quick connectors are typically used on late model GM products. These connectors have an internal o-ring and plastic clips that must be secure (verified) to be sure everything stays together. If you need connectors fabricated or supplied to...
Question
Transmission fluid
Hi There, Dextron VI is what replaced Dextron II and III. I would strongly suggest trying to locate or have Dextron VI shipped to you if it is not available locally as this is the correct and recommended transmission fluid...
Question
Leaking antifreeze
Hi There, The heater hose leaking may not immediately cause damage, however depending on how severe the leak is, the coolant may be leaking out at a pace that could cause engine damage or overheating relatively quickly. I would not...
Question
Truck won't start
Hi There, You may want to check to be sure the fuel pressure regulator is working properly. The fuel pressure regulator is a device which controls the pressure of fuel supplied to the fuel injectors on an engine. This works...
Question
Stopped accelerating and shaking at highish speeds?
Hello, thank you for writing in. The first step is to find out what issues are triggering the check engine light. This can be done by having the vehicle scanned for diagnostic troubleshooting codes at your local auto parts store,...
Question
Need estimate on blown head gasket repair for 1996 s10 4.3 v6
Head gasket replacement sometimes requires machine shop work. If the head and block are not flat within an incredibly tiny tolerance (often .002 inches), it's a waste of time to replace the gasket as it will just leak anew. So,...
Question
i have a 01 gmc sonoma the ignition cylinder locked up so it was drilled out a new one was put in but the key will only turn to th
Hi there. Without being there to inspect the installation of the new lock cylinder, it's hard to assume what might be the issue. Typically though, when problems like this occur, it is due to a tumbler lock either being misaligned...
Question
What brand rotors and pads should I use on my 2000 Chevrolet Astro Van
Hello. If you want to use the best quality products then you want to make sure that you are purchasing premium parts. They do not always need to be American made as there are some import products that are good...
Question
The rpm jumps up and down about 300 rpm when accelerator is constant. Only seems to happen when traveling between 40-50 mph
Hello, thank you for writing in. The truck may be having issues with air sensors, fuel pressure, or other electronic issues. I have have to replace the fuel module and the mass airflow on my 1998 S10 with 168,000 miles....
Question
2003 Chavy Trailblazer wil not accelerate over 40 mph
Hi There, What you are describing sounds like you may have a clogged catalytic converter. The catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere. When the catalytic converter is...
Question
I have a vibration in the center of my truck from 55-80 mph
If the driveshaft was rebuilt, I would first check to be sure that the shaft is balanced AND true. The biggest problem though is identifying a facility with the appropriate CALIBRATED equipment and knowledgeable staff. If you can identify a...
Question
Replaced spider injector and now it idled high and shifts into gear hard with a check engine light on
Hi There, As you may know, after replacing the injection system your car needs to go through a "re-learning" process to bring the idle back down. When the idle is high, when shifting into gear, you may notice a rough...

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