Hey guy's a newbie here hoping for some help. I have a 1988 GL non-turbo and having problems with fuel response. The car starts fine Idles ok, not perfect. If sitting still, and floor the fuel petal it boggs down and sometimes stalls. If I apply fuel pedal slowly it will gain with no problems. My main issue is while driving or taking off from intersections I need full throttle response to get out in road, as now I cannot do that for it will miss, and want to stall. Like I said It's fine if I just slowly apply fuel pedal. Any HELP would be great.. I have replaced plugs, wires, dis cap. Also the timing is on. Thinking maybe the injector!!

It's fuel injected? Did you put a new fuel filter yet? If not it is located right at the drivers side strut tower. Maybe your fuel filter is clogged.

How about your spark plugs, wires? 

 

How does your distributor cap look?

 

Good luck,

Sam

I had a catalytic break up once.  A big piece plugged up the exit, and the car just didn't want to go.  Idle, fine, light power, ok.  Heavy throttle, blehh.

 

Fuel filter clogged / or trapping water can limit power also.

Double check all the basics first, cam timing, ignition timing, general engine mechanical condition, IE compression or leak-down test passed. Check for current and history codes. Failing any help there, check fuel system pressure and filters, and the coolant temp sensor. Next replace the TPS if a high mileage vehicle and verify that the MAF is good and working. More of these cars than you think by now have the check engine light pulled out due to re-occuring purge and egr solenoid failures. You can do a simple vacuum test to see if the cat is restricted.

 

Once all of the faults are corrected - and this is the important part - (it is a really simple system) then these engines run very well. If you are driving around an SPFI system in fault mode (IE a code is set for any reason) then the engine is not running as designed IMO.

Edited January 1, 201511 yr by Crazyeights

+1 for a broken cat

 

+1 for injector to manifold seal

 

+1 for a break in the intake duct

 

+1 for a dirty spitty injector

 

how is compression testing ?

Yes changed fuel filter, plugs, wires, dis cap as well.

Thanks for the in put, I'll do some more checking on the above, and keep you posted.

OK guy's here is was what was wrong.  I put new Injector in, and had same results. So I found a used throttle body , and put my new injector in it, and wow runs like a new one. So only thing I can figure was one of two things either air control valve, or TPS sensor.  Thanks for the info..