Tbi

30

Asked by Mar 09, 2016 at 09:41 AM about the 1987 Chevrolet Chevy Van 3 Dr G10 Cargo Van Extended

Question type: Maintenance & Repair

Does anyone know if both injectors are supposed
to spray at same time. I can only get one to spray
but both have power

6 Answers

71,355

Yes they are to spray at the same time. Sounds like a bad injector, but replace both.

30

Well if i switch bad injector to other side ot works. And im getting 10volts to both set of wires.

71,355

Ok, the side that don't work, 2 wires run up to the injector, right? One wire is a power, the other is a ground. Both wires run back to the pcm which controls the injector pulse by grounding the one side. Try checking the ground side of that circuit. If this is not a wiring problem, it may be that the TBI would need to be rebuilt as the fuel regulator spring gets weak. There are kits available, and the TBI is simple to rebuild. Fuel injectors need a certain amount of fuel pressure to work. Your fuel pressure is 90 to 13 lbs. Did you try the good injector on the bad side?

30

Yes i switched injectors and it worked. The ground wire is spliced before it comes into injectors. So if one side is grounded they both are since its a pigtail. This is so weird.

71,355

How long has this run with the ground wires spliced or has it? Cause that does not sound right to me.

30

I just bought the van like 6 mths ago but it ran just fine for the last 4 months and the ground pigtail was there when i bought it. To make it more interesting i hot wired the bad side and they noth would work for about 15 mins til the fuse of the hot wires blew. So in short both injectors can spray and getting good voltage etc. Stumped

Your Answer

Add photo

Related Questions

  • Tbi 6 answers

    Does anyone know if both injectors are supposed to spray at same time. I can only get one to spray but both have power

    1987 Chevrolet Chevy Van 3 Dr G10 Cargo Van Extended

    -

    Maintenance & Repair

  • 1992 Chevy G20 Van 350 5.7L TBI 1 answer

    Won't Crank, All Panel lights on, used to crank after 5 tries of turning the key, now it wont

    1992 Chevrolet Chevy Van 3 Dr G20 Cargo Van

    -

    Maintenance & Repair

  • Broken o-ring in tbi 4.3l 46 gm extreme flooding 2 answers

    Today I pulled out my fuel injectors since one of them was clogged up. Got that part taken care of, minus one oring at the injector sprayer. Ran rich, but fine. Got to auto parts store for oring an...

    1994 Chevrolet Chevy Van 3 Dr G20 Cargo Van Extended

    -

    Maintenance & Repair

  • TBI 2 answers

    i just replaced my old TBI throttle body and now she starts up and runs really good but when i put it in gear and go it has no power and dies after about 2 blocks does any one know what the deal is?

    1989 Chevrolet Camaro IROC Z

    -

    Maintenance & Repair

  • i have a 1992 chevy g20 350 tbi and it idles fine, but once in gear it misses through all speed ranges no check engine light on,i can also hear a pinging or knocking but only when driving, help?thanks 2 answers

    I replaced the fuel filter plugs,rotory,cap ,coil, it idles fine but when driving it misses lacks power and also knocks or pings loud but only with a load on the engine, any help I would greatly appre...

    1992 Chevrolet Chevy Van 3 Dr G20 Cargo Van Extended

    -

    Maintenance & Repair

Chevy Van

Looking for a Used Chevy Van in your area?

CarGurus has 50 nationwide Chevy Van listings and the tools to find you a great deal.

ZIP:

Search Chevrolet Chevy Van Questions

Chevrolet Chevy Van Experts

#1 John Saffrahn
John Saffrahn
Reputation 350
#2 COMETGUY61
COMETGUY61
Reputation 210
#2 1977g10shorty
1977g10shorty
Reputation 210
View All

Related Models For Sale

Used Chevrolet Astro Cargo Van
135 listings starting at $2,900
Used Dodge Ram Van
118 listings starting at $2,195
Used Chevrolet Astro
197 listings starting at $1,300
Used Ford Transit Cargo
159 Great Deals out of 19,036 listings starting at $9,500
Used Ford E-150
138 listings starting at $3,650

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.