I have a 91 civic hb with a swaped in sohc 1.6L ZC. At a stand still the engine runs fine, It idles and revs up to the rev limiter with not problem. Oh ya i race it on a oval track. At pace speed its fine with short bursts (30-50 km) When its go time i mash the gas it boggs and sputters and then goes to idle. ive tried to ease in to it its ok but when it gets to a surtan speed? (no speedo) it goes to idle. i restart the car and all if fine. till its go time again. Any help would be great. Thanks



Optional Information:
Year: 1991
Make: Honda
Model: Civic hb
Engine: 1.6 ZC

Already Tried:
ecu pr4 runs it ok and dont shut down but rev limit is to low. pm7 ecu shuts down pm6 shuts dowm pr4 with rev chip shuts down

 

have you checked the basics? throttle cable/pedal, fuel system/injectors?

 

if your rev limiter is too low, probably the ecu in safe mode, or your dizzy is on the way out.

 

Ok first im not a mechanic, what would i be lookin for in the gas pedal or throttle cable? Im going to be changing the fuel pump and filter and adding fuel pressure guage ( what should the pressure be?) how can i tell if the injecters r dirty or bad?


If safe mode is idle then it only does that with higher rev limit ecus not low ones.
The dizzy (Distributer) is brand new.

Keep the ideas comin.

 

Check the timing belt. make sure it's on correctly

 

is it Automatic...this would effect a lot

 

well being that you're obd0 you can still check for codes. one thing for sure is that unless you installed an electronic vss the car will be looking for the signal from the vss.

check ecu, count the blinks of the light and post the codes here.

 

Its a manual tranny.
Whats a vss? and where would i look?
The pr4s flash a 10 and a 14 i checked them with a volt meter last spring and according to the manual they were ok.
the pm6 and 7 flash a 20 and my car does have one, the slot is empty and NEVER had one in it. could i add one and wire it up or do i have to get a different fuse box with one, or do i even need it?

 

deleted

 

10 IAT - intake air temperature sensor

14 IAC (EACV) - idle air control valve

20 Electrical load detector

the intake air temp. sensor and iacv plugs are practically identical and can be switched up.

the eld is located inside the black engine bay fuse box, usually you have to replace the whole fuse box for it to go away

vss = variable speed sensor. it is located on your trans. just curious, why aren't you running a gauge cluster? there are some important gauges built into the cluster that, unless you are running aftermarket ones, you really should have.

 

What are you running for an exhaust system? If you still have a cat it could be plugged?

 

Hmmm...Oval track? could it be fuel starvation?
do you run it full or near empty to save wight?

 

you dont need to replace the box to get the ELD code to go away there is a three wire plug in the box that gets gunked up with **** unplug it spray it with some brake clean and plug it back in that will fix that code as for the rest of your codes the solutions presented should work

 

When i mash the gas it pretty much boggs right away.

The vss is it mounted on the top of the tranny and has 2 wires comin out off it? cause mine has one but the wires r cut off. where should they go to? Pic or diagram?
I run a after market tach and volt meter the oil pressure and water temp were line were cut when previous owner pulled his ZC out. but i will get new ones in the spring. Should i have anything else?
I believe the Cat has been removed.

I Always have enough fuel ever since i ran out with 2 to go while passing for the lead in a lower class runnin my other civic with a 1.5
So the eld code is no big deal? code 20

What should the fuel pressure be?

 

The Vehicle Speed Sensor (VSS)(PCM)
generates a frequency signal input to the Powertrain Control Module to control such parameters as fuel injection, ignition timing, transaxle shift scheduling, torque converter clutch scheduling and vehicle speed.

 

x2

 

ok so the fuel starvation doesn't seem to be the problem... guess i would start checking timing,fuel pressure. you know,check the basics...make sure the exhaust is unobstructed... pull your plugs...fouled? ummm... if you have the option of switching out some parts with ones you know work that may at least help to eliminate some things... lastly get out the multimeter and do the tests to make sure that the proper amount of juice is getting where it needs to.... hopefully something will show up in all this... goodluck

 

Is this a new problem or has it always done this? I would look into the vss because it only does it in gear does it shift okay? Anything else like a vacum leak or mixed up sensors should do it at idle too. Maybe a clogged fuel filter.

 

Ok i swaped tranny's last year to one with a welded diff. and i dont recall hooking up any connectors to it. i have an extra connector floating around that fits the iat and iac, is there a chance that the 3rd one will fit the vss? fingers crossed.

 

no. the vss will either be a 3 wire plug or a 1/4" (roughly) dia. cable.

 

bump

 

Damb, OK i know mine has a sensor or something on top of the tranny with 2 wires comin out of it that were cutoff , its under the area of the started, whats that?

 

Whats the blach thing between the starter and plug wires? (in pic)

 

Reverse sensor.

 

ok im going to head up the hill tomorrow and take some pics of the engine to see if anything obvious will jump out to anyone.

The car is tarped up under 2feet of snow right now