1989 Toyota Tercel

[JLH911]

1989 Toyota Tercel Hesitation problem

For many years now my Trust Tercel has been suffering from an occasional acceleration problem.

I have rebuilt the carburetor and still it hesitates. This only happens sometimes.

Upon accelerating from a dead stop, it'll almost "bog" down and totally lack power then it will surge and go back and forth that way for a couple of seconds.

I have changed out pretty much everything tune-up wise over the years to no avail. I just learned to live with it but now, I'd like to finally solve the problem.

Any ideas on what it could be?


Thanks in advance.

 

[4x4CPOSEADOG]

How many miles you have on that Tercel? Have you checked all the vacuum lines for looseness or cracks? Did you set the air fuel mixture screw correctly when you rebuilt the carb?

I used to have an 89 Tercel and always keeps the carb butterfly clean with Berkebile 2+2 carb cleaner. Check your air cleaner housing, it has a sensor attached next to the air filter. Those sensor sometimes get bad and could be the one giving you the problem. You may have to much carbon on your intake manifold, piston/piston rings.

 

[sirenmoses]

Something similiar happened to my 84 Accord. Shop found large bits o' gunk in the carb, got it cleaned out: no more stranded in town/on the freeway, etc.

Had a motorcycle do the same kinda thing. Replaced the fuel lines (gummy from 10 yrs of use) and it was all better (til I blew a piston: different problem & story).

HTH

 

[underthehood]

its possible that the EGR valve is opening too soon. disconnect the hose going to the EGR valve and put a golf tee in the hose that you pulled off. if the problem goes away then you know the problem is related to the EGR or its controller. good luck.

 

[fsusteve]

does the carb have an accelerater pump?

 

[JLH911]

does the carb have an accelerater pump?

its possible that the EGR valve is opening too soon. disconnect the hose going to the EGR valve and put a golf tee in the hose that you pulled off. if the problem goes away then you know the problem is related to the EGR or its controller. good luck.

Don't know if it has an accelerator pump. I'll look.

I think the EGR valve was recently changed at my last smog check/repair.

The carb was cleaned and is still cleaned. It's almost like it's getting starved of fuel then all of a sudden, it goes back to normal and I get full power.

It's very irritating to say the least.

 

[JLH911]

How many miles you have on that Tercel? Have you checked all the vacuum lines for looseness or cracks? Did you set the air fuel mixture screw correctly when you rebuilt the carb?

I used to have an 89 Tercel and always keeps the carb butterfly clean with Berkebile 2+2 carb cleaner. Check your air cleaner housing, it has a sensor attached next to the air filter. Those sensor sometimes get bad and could be the one giving you the problem. You may have to much carbon on your intake manifold, piston/piston rings.

It has 256,000. I don't think there are any vacuum leak,s but I'll check. It only does this about 20% of the time. It's enough to bother me though.

 

[4x4CPOSEADOG]

Have you changed the fuel filter? Also there is a sensor underneath the carburetor, I think they call it the heat pad. Mine was bogging down on the road and I thought it was the distributor/sparkplugs/wires, but when I took it to the stealer they told me that it was the sensor under the carb. You may want to check that one out.

 

[JLH911]

Have you changed the fuel filter? Also there is a sensor underneath the carburetor, I think they call it the heat pad. Mine was bogging down on the road and I thought it was the distributor/sparkplugs/wires, but when I took it to the stealer they told me that it was the sensor under the carb. You may want to check that one out.

Really? Sensor under the carb? I'll have to check that out.

Describe exactly what yours did. I know it bogged but would it do it all the time?

Mine does it at the most inopportune times. It just BOGGGGGSSSS down then all of a sudden the power comes back incrementally, like I had a very laggy turbo!

Thanks

 

[4x4CPOSEADOG]

JLH911,

Did you fix the problem? Is it still bogging down?