Hesitation under load

[Sethterry1696]

I have a 94 silverado with a 350 motor has around 60k on it. Truck runs great other than if you really get into second gear bogs really bad around 2500rpm once it clears up it pulls good. Also has a very intermediate miss at idle and has a very rich smell. Any help would be appreciated

 

[JOHNGAAA1]

Start by checking fuel pressure.

 

[1997]

any codes, OBD1 can set codes without the check engine light coming on.

 

[Schurkey]

Start by checking fuel pressure.

...under load, in second gear, when it's bogging.

any codes, OBD1 can set codes without the check engine light coming on.

But don't stop with just "checking codes". Codes can be useful, but the real clues are in the data stream. While you have the scan tool connected, verify EVERY sensor, verify the computer outputs.

 

[Sethterry1696]

any codes, OBD1 can set codes without the check engine light coming on.

I used a jumper wire on the obd1 port and only the diagnostic code flashed

 

[Schurkey]

Stop looking for "codes", start looking for the data stream, and the fuel pressure.

 

[Sethterry1696]

Stop looking for "codes", start looking for the data stream, and the fuel pressure.

Well what scan tool do I use

 

[Schurkey]

I spent 20 years using a Snap-On MTG2500 (similar to the less-expensive MT2500) and software cartridges that got me VIN-specific access from 1980 1/2 to 2005 or so.

When I killed that tool, I bought a Snap-On Solus Pro, with software from '80 1/2 to 2007.

Both of those purchased "used" on eBay at a fraction of their original cost.

Other folks get by with cables and software to run on a laptop computer. I've got ZERO experience with that, and I seem to have none of their troubles, either.

There are other professional-grade scan tools than just the Snap-On family; but I've got no experience with them, either.

And there's a huge stinking pile of bottom-feeder consumer-grade junk that I don't have any experience with, either.

 

[Sethterry1696]

I spent 20 years using a Snap-On MTG2500 (similar to the less-expensive MT2500) and software cartridges that got me VIN-specific access from 1980 1/2 to 2005 or so.

When I killed that tool, I bought a Snap-On Solus Pro, with software from '80 1/2 to 2007.

Both of those purchased "used" on eBay at a fraction of their original cost.

Other folks get by with cables and software to run on a laptop computer. I've got ZERO experience with that, and I seem to have none of their troubles, either.

There are other professional-grade scan tools than just the Snap-On family; but I've got no experience with them, either.

And there's a huge stinking pile of bottom-feeder consumer-grade junk that I don't have any experience with, either.

I am gonna replace the coolant temp sensor for the computer cause it's cheap and easy and if that don't fix it I will look into getting a scan tool

 

[1997]

Well what scan tool do I use

check out the Actron 9690