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Ask Chris (aka-Moose) Your Own Question
Chris (aka-Moose)
Chris (aka-Moose), Auto Technician
Category: Toyota
Satisfied Customers: 901
Experience:  16 years of experience
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I have a 1996 rav4 with a misfire on no. 3 cylinder replaced

Customer Question

i have a 1996 rav4 with a misfire on no. 3 cylinder replaced all plugs an wires dist. cap and rotor button. compression checked out ok. replaced no 3 fuel injector. it only misses when your cruseing with light throttle 55 to 60 mph. when you accelerate it goes away. 211,000 miles.
Submitted: 10 months ago.
Category: Toyota
Expert:  Chad Farhat replied 10 months ago.

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

Expert:  Chad Farhat replied 10 months ago.

1- distributor is still original

2- have you checked for intermittent ground to injector from ecm

3- any check engine light on .

4-egr system cleaned and throttle body plate ?

Customer: replied 10 months ago.
distributor is original as far as i know. check engine light was on code was misfire 3 cyl. intermittent ground to injector from ecm can you explain. throttle body plate and egr. system has not been cleaned. vehicle has been setting for about a year been puttin fuel injector cleaner in every tankful. runs good except for the miss.
Expert:  Chad Farhat replied 10 months ago.

ok sorry for the delay i m back had to step out

let pull out the circuit diagram for it

Customer: replied 10 months ago.
have only ran about 400 to 500 miles. previous owner said i used very little oil.
Expert:  Chad Farhat replied 10 months ago.

what was the compression value?

do you have a black & red wire and black & yellow wire on the injector connectors

Customer: replied 10 months ago.
compression 100 not sire about wires i didn"t change injector.
Expert:  Chad Farhat replied 10 months ago.

The compression should be 185 or at minimum 135 per specs .

what are the rest of cylinder ?

did you change injector or not ?, you said you did in first notes, please let me know

Thanks

1996 Toyota Truck RAV4 4WD L4-2.0L (3S-FE)

Compression Pressure ............................ 1,275 kPa (185 psi) or more Minimum Pressure .......................................... 932 kPa (135 psi) Cylinder Pressure Differential .............................. 98 kPa (14 psi)

Customer: replied 10 months ago.
injector was changed by a local mechanic not by me. all cylinders checked at 100 psi. he said he did a leak off test on no. 3 and it held pressure.
Expert:  Chad Farhat replied 10 months ago.

these are the specs of my all data subscription account for my shop

if we give the allowance of the 14 psi differential between cylinders we still low , don't you agree.

i understand what he is saying , but my 100 psi is low across the cylinder and not within specs,

if all the plugs,wires, cap & rotor button have been changed and you still have that hesitation ,what else is there

the car will run at 100 psi , with no issues especially these engine pretty tough , but the ecm will sense that issue

and throw the check engine light on .

is it more evident on idle the skip ?

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

Customer: replied 10 months ago.
it idles,accelerates,and runs smooth a low speeds. can only feel miss at around 50 to 60 mph at around 2000 to 2200 on tach at light throttle.