'96 Random Hesitation Stumble at Idle, Low Throttle, and High Trottle

[andersonoverland]

I'm thinking TPS.

 

[bestday99LC]

I'm thinking TPS.

I feel this way too or maybe a combo of TPS and IAC. The TPS malfunctioning would affect both idle and throttle conditions, i think.

 

[bestday99LC]

This is a photo from another thread recently that shows what an OEM rotor looks like. I don't know if there have been changes to the rotor over the years but it looks like someone replaced the original with what you have. I could be wrong, but both my 97 lc and lx look like what @george_tlc posted.

yea my distributor def isnt OEM then, I will put a replacement on the short list, especially if there is oil. I did replace the rotor and cap already.

 

[BTLSHP]

How would I Check with carb cleaner in place? Just spray all around it to see if I notice a change in rpm?

Yes, I prefer an unlit propane torch. All you are doing is using the engine vacuum at idle to see if there is a hole or crack that will admit more fuel. This is what I did prior to replacing mine, it was just too fragile.

 

[bestday99LC]

I started with distributor cap and this is most likely it. I’m going to try pull one from a parts car.

Couple questions on mine, I probably have a few hundred miles on this rotor and it’s covered in white spots, what is that from?

Also, it looks like I’m missing some sort of gasket or something on the top of the distributor to lock in the wiring.

Edit I just didn’t have that plug part installed right.

 

[bestday99LC]

All my parts came in and I replaced the plugs, wires, distributor, rotor, o-ring little gasket for the cap. everything from Mr. T except i got the distributor used from a Mud Member.

I drove it yesterday about 30 miles and then again today to work. So far the hesitation is gone but I fell for this once before, I guess time will tell. I will post back here in a week or so if it is still gone.

 

[kamc13]

All my parts came in and I replaced the plugs, wires, distributor, rotor, o-ring little gasket for the cap. everything from Mr. T except i got the distributor used from a Mud Member.

I drove it yesterday about 30 miles and then again today to work. So far the hesitation is gone but I fell for this once before, I guess time will tell. I will post back here in a week or so if it is still gone.

Has the problem stayed away? I am fighting similar symptoms in my 93, however so far they have been mostly at idle. Planning on changing plugs/wires this weekend to see what happens.

 

[bestday99LC]

Has the problem stayed away? I am fighting similar symptoms in my 93, however so far they have been mostly at idle. Planning on changing plugs/wires this weekend to see what happens.

Yes so far so good I have been putting a lot of miles on and no issue. Just got done driving it for a 2 hour LA drive in traffic just now. No engine issues