Can't find the problem

JBAUER1215

MEMBER
1986 TOYOTA PICKUP
4 CYL
4WD
MANUAL
149,000 MILES

I have a 1986 toyota pickup it has a problem I just cant figure out it starts and idles fine but when you start driving as soon as it has a load under it like driving up a hill it will cut out really bad an u loose power you have to down**** to regain any but it gets worse and worse and will die out over and over agian ive rebuilt the carb change the spark plugs and wires but a new distrubitor cap and rotatar on checkd the timing it was fine tested the coil it was good and check compression by takeing out the spark plugs and using a compression tester and it has good compression I'm running out of Ideas please help

5 Replies

MERLIN2021

MECHANIC
17,250 POSTS

Check fuel pump pressure, the tip off is loosing power up hill and under loads, sounds like fuel starvation.

Was this

answer

helpful?

Yes

No

Sunday, February 13th, 2011 AT 2:43 PM

JBAUER1215

MEMBER
3 POSTS

I also just put a new fuel pump and fuel filter in it once it starts acting up it just gets worse and worse It will die out and I have to constatntly restart it it will also thrust like its getting fuel then loosing fuel then getting fuel somebody told me my distributor might be bad what do you think about that?

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Sunday, February 13th, 2011 AT 2:49 PM

MERLIN2021

MECHANIC
17,250 POSTS

How far off is the timing? If you know how to use a dwell meter, hook it up to the tach wire, and rev the engine, if the dwell changes by more than 3-4 degrees, the distributor shaft is worn.

Was this

answer

helpful?

Yes

No

Sunday, February 13th, 2011 AT 3:31 PM

JBAUER1215

MEMBER
3 POSTS

The timeing is good it runs perfect when it is idleing the distributor shaft is about the only thing left that I can think off ass well what is a dwell meter and where could I purchase one?

Was this

answer

helpful?

Yes

No

Sunday, February 13th, 2011 AT 3:48 PM

MERLIN2021

MECHANIC
17,250 POSTS

Any part store should have one, it's a tune up analyzing gauge, tests RPM, Dwell angle and volt amps. Directions will be included with the meter. Remove the distributor cap, see if the shaft can be wiggled side to side, it should not, and if it does there is a worn shaft. Also with cap removed turn engine by hand until the rotor moves, then go the other way, see how much slack is there, A timing chain streching can cause problems too. A stuck EGR, Closed choke, blocked exhaust, weak coil, all can cause your symtoms.