1987 Toyota Camry Constant Missing and dies when throttle I

JTINEO

MEMBER
1987 TOYOTA CAMRY
4 CYL
2WD
AUTOMATIC
13,600 MILES

Engine hard to start, idles but has a constant miss even at high revs. It completely dies when throttle is pushing down quickly, but does fine if throttle is moved slowly.
Have done the following:
Changed the fuel filter, changed the air filter, checked the dist. Cap/rotor/wires (no cracks), used starting fluid to look for vacuum leaks (none found), checked duct from air cleaner to eng (no crracks), Alt/battery good.

Thanks for your ideas,
Joe.

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires

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Sunday, October 25th, 2009 AT 3:36 PM

JTINEO

MEMBER
2 POSTS

Just a follow-up to your great suggestions:

I also checked the spark plugs by removing each one-by-one while it was running - I did notice a change when each one was pulled - can I rule out the plugs/wires?

Is there any way that you can provide more details for all your suggestions or where to go to get the details?

Thank you so much

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Monday, October 26th, 2009 AT 8:29 PM

RASMATAZ

MECHANIC
75,992 POSTS

All the details on checking and testing are in the repair manual if you wish can download it here for a cheaper price-

What you'e doing there by removing the plugwire from the sparkplug is a cylinder/balance test- How old are them plugs and wires-don't know replace it-

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Monday, October 26th, 2009 AT 9:30 PM