Engine Problems

Car: obd0 91 Crx w/b16a y1 cable trans. engine is completely stock

Symptoms
Overall power restriction
Engine Bog when throttle pressed more than ½
Vtec sputtering/hesitation no pull
takes more throttle than it should to accelerate
no cel


Replaced Parts At Install
Clutch
Spark Plugs
Plug Wires
Dizzy

Replacement Parts After Install
map sensor
o2 Sensor A,B X2
Fuel Pump 190
Intake Air Temp Sensor
Idle Air Control Valve (Cleaned)
High Flow Cat
Exhaust
Air Intake
Throttle Positioning Sensor (Calibrated)
Vacuum Hoses
Knock Sensor
Ignition Coil
Fpr

Test and Services Done
Compression Test
1 185
2 185
3 184
4 185
Leak Down Test
Fuel Injector Cleaning
Valve Adjustment
Continuity Tested Harness
Fuel Pressure gauge reads 40psi
Ignition and Cam timing dead on

Side Notes
Plug wires thicker gauge than stock due to shorting out to valve cover.
Vtec engages no power increase.
o2 wires have been swapped
tps wires have been swapped

 

what ecu?

 

Pw0 i have tried 3 other pw0 ecus as well

 

have you shot timing?

 

I did the timing. Timing is perfect. Dizzy is at 16 btdc and cams,pulley, and timing mark on belt cover all lined up. Cams are both lined up no tooth jumpage. Messed around with the dizzy but no success. Thanks for your help. 211 views but only 3 respones come on somebody has to know something.

 

Any check engine lights on?

 

There are times when i downshift into 4th and floor it around 5k it will trigger an cel. As soon as that happened it drove alot better. Gained hp. The cel is for o2 code 1.

 

unplug o2 and see if it runs better

 

Yea i did that. Not a difference and also doesnt cause a cel

 

check tps volts, closed and open

 

i have already caliberated it properly

 

Loose cut crimped wire somewhere. Is the block grounded? If it is not mechanical then it must be electrical. You have covered all of the mechanical side i believe. lots of electrical too i see. Does it idle OK? What plugs are you using? Stupid question fuel filter? Have you tried another dizzy? I know it was changed before but it could be igniter or controller.

 

A friend in a week or so is going to let me try his injectors and hook up a wideband o2 and try and see if we can figure out if it is a fuel problem.

 

I soldered and heat shrinked every wire. Went thru and double checked all wires at ecu and traced them to the sensors they are supposed to go to. Block is grounded at valve cover, thermostat, battery to chassis and to trans bracket. Idles good sometimes it will dip up and down if i have my heater on for to long. Platinum Ngk Plugs. Yea fuel filter 3 months old. Yea had my original an bought a new one as well.

 

Well today my buddy threw a wide band on my car. What he noticed was when i would let off the gas it would go full rich on the Aem meter. But when i when wot it would be around 15-17 and idle at 14-15. When you let off the gas isn't it supposed to go full lean. He thinks it wiring related. He suggests getting a si engine and underdash harness.

 

Well i finally figured out what the problem was. A buddy was swapping out my resistor box to see if that was the problem and it wasn't but i looked at the wires going into the plug and the male plug wires and female plug wires didn't match up. So i had to wires switched. In a write up it said order didn't matter but that only applies to the red wires must match up to the black wire on resistor box. Yellow must go to the red on the resistor box. Lesson learned the end.