Blazer Forum - Chevy Blazer Forums

Blazer Forum - Chevy Blazer Forums (https://blazerforum.com/forum/)
-   1st Generation S-series (1983-1994) Tech (https://blazerforum.com/forum/1st-generation-s-series-1983-1994-tech-40/)
-   -   1991 fuel injector problem (https://blazerforum.com/forum/1st-generation-s-series-1983-1994-tech-40/1991-fuel-injector-problem-29816/)

RolingKCBlazer 04-20-2009 11:25 AM

1991 fuel injector problem
 
i have a 91 S-10 blazer with the 4.3 4x4 and im getting .12v to the driver side injector which just pumps fuel on top of/all over the NEW injector an im getting .00 .01v to the driverside injector which inst bringin any fuel through

any thought? or methods of fixing this

swartlkk 04-20-2009 11:27 AM

Have you checked the wiring back to the ECU? Both should be getting the same signal. It is a PWM (pulse width modulated) signal so you really need a scope to see what it really is getting.

RolingKCBlazer 04-20-2009 12:36 PM

ya all wires are fine none are pinched or cut so idk why the driver side injector and getting no power.

swartlkk 04-20-2009 03:14 PM

How fast is your refresh rate on your DMM? Are you just not capturing the peaks when the pulse happens? Have you tested it with a noid light?

RolingKCBlazer 04-20-2009 04:33 PM


Originally Posted by swartlkk (Post 211961)
How fast is your refresh rate on your DMM? Are you just not capturing the peaks when the pulse happens? Have you tested it with a noid light?

no i havn't. i dont have a light. i tested the power to the injectors with a voltage meter.

swartlkk 04-20-2009 08:48 PM

Was it a digital or analog volt meter. Reason I ask is because the IPW (injector pulse width) may only be a few milliseconds with a few milliseconds between pulses. A DMM with a low refresh rate may only see one part of the signal.

RolingKCBlazer 04-21-2009 01:08 AM

its digital meter


All times are GMT -5. The time now is 05:31 PM.


© 2024 MH Sub I, LLC dba Internet Brands