Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN









car wont start! 1991 chevy caprice. help!!!!


  Email This Post



darconjones78
New User

Jun 19, 2012, 7:36 PM

Post #1 of 7 (3592 views)
Shortcut
car wont start! 1991 chevy caprice. help!!!! Sign In

I have a 1991 Chevy caprice. The fuel is not getting to the engine. I changed the pressure regulator, I checked the fuel injectors, changed the fuel filter, I hear the fuel pump coming on but only little drops of fuel come out of the injector. I checked the fuse, and voltage. When I put gas in the Carb. It turns over! I'm lost what could be the problem? Why doesn't it seem to get any pressure, or fuel to the injector?


Discretesignals
Veteran / Moderator
Discretesignals profile image

Jun 19, 2012, 7:46 PM

Post #2 of 7 (3569 views)
Shortcut
Re: car wont start! 1991 chevy caprice. help!!!! [In reply to] Sign In

Either you have no fuel flow from the pump to the throttle bod, no injector pulse from the ECM, or bad injectors ( two injectors bad at one time is rare).

Probably the easiest thing to do is check for injector pulse using a NOID light for TBI injection. The light should rapidly flash while cranking the engine.

If you have pulse, the next thing would be to check fuel pressure. Unfortunetly, TBI isn't really mechanic friendly when attempting to connect up a fuel pressure gauge. You'll have to T a gauge in line after the fuel filter.

There should be a test connector near the battery for the fuel pump. If you run a jumper wire from the battery positive to that connector, you can send power to the pump without having the ignition on or cranking the engine. With the pump running, you can listen to the pump running through the fuel tank filler tube. If you hear splashing going on in the tank with the pump running, more than likely the pulsator or rubber hose inside the tank rotted out.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jun 19, 2012, 7:55 PM)


darconjones78
New User

Jun 19, 2012, 8:09 PM

Post #3 of 7 (3547 views)
Shortcut
Re: car wont start! 1991 chevy caprice. help!!!! [In reply to] Sign In

I checked the injectors the light flashed for both sides. I can hear the fuel pump coming on but I don't get any pressure to the injector. It drips a little gas but not enough to keep it running


Discretesignals
Veteran / Moderator
Discretesignals profile image

Jun 19, 2012, 8:14 PM

Post #4 of 7 (3543 views)
Shortcut
Re: car wont start! 1991 chevy caprice. help!!!! [In reply to] Sign In

If the NOID is flashing, more than likely you have injector pulse. Now you have to be careful using NOID lights because they draw very little current compared to an injector. A bad injector driver might be able to flash the light, but might not be able to pulse the injector. It does happen from time to time, so the NOID can lead you down the wrong road sometimes.


The next thing you need to do is check the fuel pressure. Your going to have to T a gauge inline. Too lazy to look at specs in service information, but fuel pressure should be around 13 psi.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jun 19, 2012, 8:15 PM)


darconjones78
New User

Jun 19, 2012, 11:07 PM

Post #5 of 7 (3523 views)
Shortcut
Re: car wont start! 1991 chevy caprice. help!!!! [In reply to] Sign In

Yeah, I'm not getting no pressure! Would that be the fuel pump?


darconjones78
New User

Jun 22, 2012, 12:23 AM

Post #6 of 7 (3471 views)
Shortcut
Re: car wont start! 1991 chevy caprice. help!!!! [In reply to] Sign In

OK! I got it running,but now its running rich and sluggish! It had a hole in the rubber fitting right above the fuel pump so I changed that and the fuel pump since we had the tank off. It keep loosing.g power now as well. Do u think IRS the battery?


urania
Novice

Jul 5, 2012, 8:15 AM

Post #7 of 7 (3399 views)
Shortcut
Re: car wont start! 1991 chevy caprice. help!!!! [In reply to] Sign In

You must check the installation of the coil pack and distributor. Including something in the fuel system or fuel pump. To get a car to start, you need compression, ignition, and fuel. So, have the ignition and fuel systems checks. Ignition and electrical first, then fuel.




Advertising


  Email This Post
 
 






Latest Forum Post

I have a weird situation in that my run lights won't work on my utility trailer....


My 1995 Nissan Quest starts just fine. When I depress the brake pedal and move t...


hi, my engine still runs after i turn the key off then dies after few seconds, w...


I recently blew an engine-'01 CHEV SILVERADO 5.3L-& had an '02 5.3L transpla...


I have a 1992 ford ranger 3.0l v6 5 speed. today i ran out of gas and when i got...


Hi there! I had a problem with my clutch, removed the transmission and need to ...


Feed Button






Automotive Forum Categories
AC Auto Repair
Auto Body Repair
Auto Insurance
Automotive Repair
Automotive Wiring
Automotive World
Brake Systems
Car Care Tips
Car Racing
Car Shows and Events
Car Stereo Repair
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair
Gasoline and Motor Oils
General Discussions
Motor Vehicle Inspection
Motorcycle ATV Repairs
Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Repair
Motorcycle Seat Repair
Remote Control Cars
Steering and Suspension
The Bargin Bin
Traffic Ticket Help
Tricks of the Trade
Truck Repair
Truck Repair Advice
Truck Engine Repair
Truck Suspension Repair
Car Forum - Sitemap


Search for (options) Privacy