Had to trim up your quote up MentalCaseOne, you talk to much.

Anyway. I always blamed my hesitation off idle on my torque converter and didn't worry about it. but if you guys have the same problem with m6's heres my 2 cents.

It isn't your ignition. In the past 6 months my 94z has seen juyst about every ignition modification you could imagine. right now I got coilpacks with a built in MSD ignition, same problem.
Rockers could definately be a problem. When I put mine on I thought I adjusted them to 3/4 past, but one came loose so I probably screwed them all up.I'll probably try tightening them with the engine running next.

 

do you still have it

 

i have the same thing everyone is describing, very hesitant about 1500 rpm and above after it get warm. so i took off the air cleaner assembly and notice a little puddle of coolant sitting on the water pumps arm. so i go under the car and sure enough i see that my optispark is wet, i am mad but relived that i may have solved the problem but now i have to buy a new water pump and optispark.

 

Hot Dam!! I talk too much.... he is right.

One more thing. The spark plug resistor. I had my car idling and low rpms just fine.. but when I gave her about a 1/4 gas she would misfire. This happened to me three times in a row with NGK's. The inside resistor or the insulator would crack. The last two times it was the resistor. It went from about 3 kilo Ohms to about 45 kilo Ohms after about a month of driving.


I switched to (dont shoot me) Bosh Single Platinum and been driving for months and my problem never came back. I need to update my info down below when I come back from work


I was buying the NGK's from the same place so I bet they had a bad Batch or they were not the real thing.


Marvin

 

WOW this is a long thread. in the life of this thread i am on my SECOND LT1 lol

 

The thread that never dies

I just said fuggit and got rid of it, and wouldn't you know, Wifey bought me an 01SS.

 

Hot Dam!! a 01 SS? Dude does she have a sister just like her?

Honestly LT1 probs are like Ignition, ignition, ignition.... or it seems like it. Everytime I had some kinna problem it was the spark plugs... never the wires and never the opty so far.

Marvin

 

alot of times its just bad 02's. alot of people dont look at those because you wouldnt think they would cause a nasty miss. but believe me, the miss is NASTY.

 

would o2 go bad because of fuel being to rich?

 

not the fuel itself but AF mixture being too rich. and bad 02s dont always throw codes.

 

Yeah a rich fuel mixture is one of the main killers of oxygen sensors. and he's right. lazy o2's generally don't throw codes. but you can usually diagnose them with a good data stream.

 

I too had the dreaded LT1 hesitation to 2000 RPM. I found this thread yesterday and read it for many hours.

This is what I came up with for fix possibilities:
Water (coolant) temp sensors (2 which screw into the block)
EGR valve
Ignition control module
Fuel Filter
Throttle position sensor
PCV Valve
Knock Module
MAF Sensor
Non MSD plug wires
Fuel injectors
Timing chain
Delteq (to replace original ignition)
Coil
Vacuum tubes/hoses

I took a trip to Autozone today and spent about 60 dollars total on a new coil, PCV valve, throttle position sensor, and new vacuum tubes/hoses for the egr valve and PCV valve.
I relocated the ESC to a cooler place, and cleaned the MAF sensor with a Q-tip dipped in rubbing alcohol.
These few things have brought my car completely back to life! and completely removed 100% of the <2000rpm hesitation!!!!!

Side Note: I noticed a few posts inquiring about modified MAF's. My MAF sensor is de-screened and ported out... and I will soon be replacing it with a new SLP unit. I am having trouble passing emissions, and think this could help. As for the hesitation, I know how frustrating it is, not having low end power, never getting to use 6th gear. I am so glad I found this thread!

I hope this can help everyone who needs it,
-waylow
Update: passed the emissions test with flying colors, descreened and ported MAF and all.

 

Over the years, I've had this problem numerous times.

Fixed it a different way each time.

I have a 93 LT1.

Fixed once with newer O2s, once with putting nuts behind the coil bracket and the head, and the last time was a faulty TPS sensor.

 

wow, this must be the longest on going thread. January 2002??? I hope the original posters have fixed it by now. but other than that I have nothing to suggest..lol

 

http://www.witchhunter.com/index.htm

This might help some people. Cheapest place I've found yet.

What are the symptoms of an injector that requires service?
Dirty or partially clogged injectors can show up in many ways and may include:

"check engine" light or cylinder misfire code
Poor idle
Denotation (knocking or pinging), causing possible engine damage
Low speed hesitation and surging issues
Emission problems
Loss of performance
Increased fuel consumption

Specific case (with video here)

Before cleaning: 3 out of the 4 injectors were flowing poorly, there was a 45% flow difference between them.

After cleaning: all 4 injectors now flow within 2% of each other.


These injectors were out of the customers daily driver. The symptoms were poor mileage, rough idle, and drivability issues.

The customer called us a week after receiving them and said the his mileage improved by 30% and the idle and drivability issues we gone.