Question about 1991 Chevrolet S-10 Blazer
My blazer 91 tries to run but it seems like if it didnt have gas in the tank. so im assuming it could be the gas pump or the injectors i need help to find out what it is.
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Posted on Jan 02, 2017
I am assuming that you have the 4.3L V6.
The fuel pump is always a pain on trucks becasue you have to remove the tank to gain access. The pump is bolted in on the top side of the tank. I hope it doesn't have a full tank of gas as it needs to be drained(re-use when job is complete). Not to mention pulling a tank that's full of gas very heavy.
See this link for an overview:
Here's how you test the fuel pump relay, and fuel pump:
Also be sure to releive the fuel pressure before servicing
Good Luck again, and feel free to ask anymore questions.
Posted on Jul 03, 2008
yes you have to drop the tank. you will also need a fuel line tool to unhook the fuel lines. before you drop the tank see if tou can reach and wiggle the electrical connection on the top of the tank. these pumps have a pigtail issue. please rate
Posted on Dec 08, 2008
SOURCE: 2001 chevy blazer won't start
have you tried cleaning your fuel injectors? There is a cleaner that you put into the vaccum line that comes from the brake booster to the intake (so it feeds all the injectors all at once) it is called SeaFoam it runs about $8.50 a can. The directions are on the can.
Posted on Dec 11, 2008
Check the ECM for Codes to help you find out what's causing the problem. Here is a simple and easy way to check.
On board diagnostic (OBD) was designed on vehicles equipped with electronic fuel injection so you can generally retrieve the codes yourself. No need buying a scanner or running to any parts stores to check the Check Engine. This system is called obd1 and applies to most vehicles made before 1995 for domestics and 1993 on imports. In this article, I will discuss the methods used by domestic vehicle manufacturers on how to check the engine lights in their cars and Trucks.
For GM domestic vehicles made before 1995, the diagnostic connector is located under the dash panel by the driver side. To get the check Engine codes to flash in your dash panel, use a jumper wire or a paper clip and connect terminals A and B of the diagnostic connector. Turn your ignition key on with engine off and the codes should start to blink. All codes should start with code 12 which is one long flash followed by 2 short flashes. This code 12 means the diagnostic system is normal and will repeat itself continuously if there are no trouble codes. Otherwise, code 12 will flash 3 times before flashing the fault codes.
Counting the codes being flashed is easiest way to trouble shot problems in domestic vehicles and most of the codes can be erased or cleared by disconnecting the battery negative terminal for 1 minute and reconnect. Just make sure to check your service manual in case you have electronic equipment such as radio or clock that needs reprogramming in which battery disconnection is not recommended. Finally after performing repairs on the culprit code, always go for a road test to confirm if the problem is fixed.
Here is a link with the GM codes. http://chevythunder.com/199295_lt1_trouble_codes.htm
Good luck and hope this helps
Posted on May 02, 2009
They should be on seperate circuits. Tyour key on and ck to see if you have any fuel flow. Fuel pumps in tanks do **** out. chk to see if you have any fuel flow by loosening a fluel line. No fuel, no pump. good luck
Posted on May 17, 2009
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