[Dodgvipr99]

I have a 1992 s10 with 4.3, it starts but I have to keep my foot on the pedal to keep it running. It has new plugs, wires, cap and rotor. New oil pressure sending unit. All vacuum lines have been checked. Has new temp sensor. Just did a throttle body rebuild with all new o rings and gaskets. Check engine light is not on and has no codes. I'm lost and any help is appreciated.

 

[Big Buford]

Does this happen regardless of engine temp? You must always have foot on gas (cold or warm engine) or engine dies?

 

[Dodgvipr99]

Does this happen regardless of engine temp? You must always have foot on gas (cold or warm engine) or engine dies?

Yes it happens regardless of temp. I can start it and it will idle for 5 to 10 seconds maybe and then stall and die if I don't put my foot on the gas

 

[Big Buford]

This problem happen suddenly? Or it has gradually been getting worse?

 

[2.2s101995]

Every time I have had a car that would start and only stay running with my foot on the gas it was the IAC

 

[Dodgvipr99]

This problem happen suddenly? Or it has gradually been getting worse?

Suddenly I believe, it's not a daily driver yet

 

[Dodgvipr99]

Every time I have had a car that would start and only stay running with my foot on the gas it was the IAC

It was also replaced not long ago.

 

[Big Buford]

How many miles? Have the fuel injectors been cleaned recently?

 

[Dodgvipr99]

How many miles? Have the fuel injectors been cleaned recently?

265000 and how do you clean the injector?

 

[Big Buford]

265,000 miles is rather a lot....Congratulations! Are those miles all yours? If so, seems like the fuel injectors have never been cleaned. Even if that's not your issue, it would certainly be a good thing to do. You can remove and physically clean them or replace them if they're too far gone. Alternatively you can try a fuel system cleaner, which is used simply by adding to the fuel tank. There are many types/brands. I don't have experience but have heard from multiple sources that Seafoam doesn't do squat....waste of money. I have used Gumout Regane Complete Fuel System Cleaner multiple times and have been pleased with the results. Advance Auto sells for $6.79 at the moment. Rather inexpensive, will probably help, and will not hurt......

 

[Dodgvipr99]

I'll run it through the fuel system but I just had the throttlebody and injectors all out foe the rebuild

 

[Big Buford]

Having the injectors out is step 1. Step 2 would be actually cleaning them. If the injectors were reinstalled without cleaning, then whatever blockage was there remains.....

 

[Dodgvipr99]

I replaced the o rings and screens on the injectors and cleaned them off

 

[Big Buford]

The inside of the injectors may have carbon build-up, which interferes with fuel injection. The Gumout (or other) fuel system cleaner will help clean those carbon deposits. It may not be your issue, but it's worth a try.....

 

[oldeerslayer]

Then this is a TBI not CPI? Have you looked down at the spray pattern from both injectors. It should be a nice round spray. An old fashioned timing light makes it real easy to see the spray.

 

[Dodgvipr99]

I haven't yet. Could it be the fuel pump? If I let it sit for like 30 minutes I'll have to spray starter fluid in it to get it to start again. Yes it's TBI.

 

[Original_Owner_86]

I have a 1992 s10 with 4.3, it starts but I have to keep my foot on the pedal to keep it running. It has new plugs, wires, cap and rotor. New oil pressure sending unit. All vacuum lines have been checked. Has new temp sensor. Just did a throttle body rebuild with all new o rings and gaskets. Check engine light is not on and has no codes. I'm lost and any help is appreciated.

Did problem show up after throttle body rebuild or did you rebuilt it to try to solve problem?

 

[Dodgvipr99]

Did problem show up after throttle body rebuild or did you rebuilt it to try to solve problem?

Rebuilt to try and solve problem

 

[Ryanr]

I have a 1992 s10 with 4.3, it starts but I have to keep my foot on the pedal to keep it running. It has new plugs, wires, cap and rotor. New oil pressure sending unit. All vacuum lines have been checked. Has new temp sensor. Just did a throttle body rebuild with all new o rings and gaskets. Check engine light is not on and has no codes. I'm lost and any help is appreciated.

I had the same problem years ago, I cleaned the TBI real good still had the issue. I finally replaced it with a Holley 670cfm TBI, the problem stopped, runs amazing now. The linkage of the Holley TBI is a little tricky though to hook up.

 

[GenesS10]

Check fuel pressure. My 93 had 46lbs of fuel pressure. IIRC, it had to have 54lbs. New fuel pump, started and stayed running every time