Accord F20b swap no spark?? NEW DISSY COIL ECU CKP

[bikesdl91]

This is the first time i have had to use a form and couldn't search to find my answer. i have done 3 swaps so far prelude accord civic... but my brother just bought a PRE swaped f20b accord. with a no spark issue.

as far as i can tell Car is a 1997 accord se automatic
has been converted to a 5 speed with f20b
swap is finished but has no spark.
Wiring harness is original accord harness (auto)
has dissy with external coil

I have 2 obd1 chipped ecu's that run my 91 f20b accord just fine and also have 2 obd2 f20b jdm ecu's one auto one not. and OEM accord auto ecu that the car came with.

have tried all of these and still no spark...?
the dissy is new and is the 3rd new one i have tried.
coil is good (put it on my other car)
new CRANK Sensor although i believe it should run without this. i think it is mostly for misfire purposes. but i tried it anyway.
dissy and coil have power.

have a mac scan tool and it shows no RPM when cranking

have spent 2 weeks searching forms and checking wires running from dissy to ecu and have found no problems. can anyone tell me what im missing? or what to check?

 

[dc4dude]

Check all the grounds? I know it sounds simple, but sometimes its the simplest things... Also make sure everything is getting power...

 

[bikesdl91]

i check all grounds that i could see on the ecu pin out. also i didn't know what grounds should be grounded all the time. like i know crank sensor ground should only be grounded when cranking. also what all needs power with KOEO?

this is the diagram that i have been going off of. i think it is obd2a

Layout
A1->A11----Blank--C1->C10---D1->D5
A12->A24--Blank--C11->C22--D6->D12
A25->A32--Blank--C23->C31--D13->D16
Pin---Color ---------Desc.
A1----yel------------Injector #4
A2----blu------------Injector #3
A3----red------------Injector #2
A4----brn------------Injector #1
A5----orn/blu-------Secondary O2 heater
A6----blk/wht-------HO2S heater
A7----orn------------EGR Control Solenoid Valve
A8----grn/yel-------VTEC Solenoid Valve
A9----brn/blk-------GND (dig)
A10---blk------------GND (power)
A11---yel/blk-------PGM-FI Power
A12---blk/blu-------Idle Air Control Valve
A13
A14
A15---red/yel-------Evap Purge Control Solenoid Valve
A16---grn/orn-------Fuel Pump Relay
A17---pnk/blu-------A/C Clutch Relay
A18---gry/red-------MIL
A19---wht/grn-------ALT
A20---yel/grn--------ICM
A21
A22---brn/blk--------GND (dig)
A23---blk------------GND (power)
A24---yel/blk--------PGM-FI Power
A25---wht-----------Intake Control Solenoid Valve
A26---red/blu-------IAB Control Solenoid Valve
A27---grn-----------Radiator Fan Relay
A28---grn/wht------EVAP Bypass Solenoid Valve
A29---orn/grn------Evap control canister vent shut valve
A30
A31-
A32-
C1---lt grn/blk------Ref. Voltage for ATTS or TCM (not used)
C2---blu------------CKP Detect
C3---grn------------TDCP Detect
C4---yel------------CKP Detect
C5---blu/orn-------A/C Switch Signal Input
C6---blu/red-------Starter Switch Input
C7---red/wht-------SCS
C8---lt grn ---------K Line (scan tool)
C9-- -
C10---wht/yel------ECM Backup Power
C11-- -
C12---wht----------CKP GND
C13---red----------TDC M Side
C14---blk----------CYP M Side
C15---blu/blk------VTEC Pressure Switch
C16---grn----------P/S Pressure Switch
C17---wht/grn-----ALT Detect signal
C18---blu/wht------VSS Signal
C19 -
C20 - -
C21 - -
C22---brn/yel------IMO Immobilizer Code Signal
C23- -
C24 - -
C25 - -
C26 - -
C27 - -
C28 - -
C29 - -
C30 - -
C31 - -
D1----red/blk----------TPS Detect
D2----red/wht---------ECT Engine Coolant Temp. Detect
D3----red/grn---------MAP Detect
D4----yel/red----------Vcc1 (Power for MAP)
D5----wht/blk----------BKSW Brake Switch Detect
D6----red/blu----------KS (Knock Sensor Detect)
D7----wht--------------HO2S Detect
D8----red/yel----------IAT Intake Air Temp Detect
D9----wht/blk----------EGR Valve Lift Sensor
D10---yel/blu----------Vcc2 (Provides Sensor Voltage)
D11---grn/blk----------SG2 (Sensor Ground)
D12---grn/wht---------SG1 (Sensor Ground)
D13- -
D14---wht/red---------SHO2S (Secondary O2 Sensor Detect)
D15---wht/blu---------PTANK (Detects fuel tank pressure signal)
D16---grn/red---------EL (Detects ELD Signal)

 

[bikesdl91]

also are the wires on that diagram that say blk---------GND (power) are they supposed to have 12v with key on?

 

[bikesdl91]

Just checked again and i have good grounds at A9 and A22.

also i have NO POWER at A11 with Key on engine off.

am i supposed to?

 

[K2e2vin]

The grounds you need to check are on the thermostat housing and the main ground(transmission to frame).

Shouldn't have power to ECU until engine is on anyways. When you say new distributor is it just the cap or the whole unit?

 

[bikesdl91]

whole dissy. I replaced dissy with a good one i had in spare parts. I also tried converting this to internal coil like i did my 91 f20b accord .didn't help so i bought a remand. and it didn't work. warranted it out once. still no luck. So I ended up buying a brand new dissy. still no spark.

main battery ground on trans is good. engine has good ground. but i do not see the typical thermostat housing ground on this accord. only have a ground on the intake manifold that comes out of the harness. its on the drivers side. right under IAT sensor i think...

also have a 4 pin plug coming out of fire wall harness from ecu (right by fuse box where ECU harness PLUGS into engine harness) that has 3 brown wires and 1 black. it is not plugged into anything and have striped the engine harness down and cant seem to find where it would go. i though maybe it was just old grounds form the automatic trans?? dunno?

like i said car used to be an auto and still has auto harness as far as i know. has 3 or 4 plugs not used that went to the old trans. not sure if it makes a difference. but still have crank no start. with no spark.

 

[bikesdl91]

Anyone??? Please help???

 

[AccordH23Avtec]

what ecu are you running?

 

[dc4dude]

Check to see if accords have a main relay... Im not sure if they do, but it sounds like either that can be an issue, also check to see if your ignition switch is working right.

 

[bikesdl91]

i have 2 chipped obd1 ecus tunning on crome. i have a 1991 accord with f20b and both of the ecus work fine with it. i also have the factory accord se automatic ecu and a obd2 jdm ecu that came with the f20b. its a 5 speed computer.

i have tried all of these and none have worked. but i would like to end up using a obd1 ecu that i can tune. like i said i have 2 good chipped obd 1 ecus that run my 91 cb7 just fine. but no luck on this accord.

 

[bikesdl91]

also the main relay controls the fuel pump and power to dissy and coil. blk/yellow wires. the fuel pump is working fine and the dissy and coil have power. i can hear it click when i turn the ignition switch on. is there anything else the ignition switch should be doing that i can check? seems to be working correctly.

 

[bikesdl91]

The grounds you need to check are on the thermostat housing and the main ground(transmission to frame).

Shouldn't have power to ECU until engine is on anyways. When you say new distributor is it just the cap or the whole unit?

any idea on the missing grounds or are the accord just supposed to have the bundle of grounds on the intake only?

do you know what pins on the ecu should have a ground? i could only find 2 that i knew should...?

 

[AccordH23Avtec]

have you switched A15 to A16?

 

[bikesdl91]

no i havent. i can check to see if its been done. but why would I need to do that?
i can hear the fuel pump kicking on and have fuel to the rail.

Can you explain?

 

[langston2005]

F22 no spark

Hey im having the same problem. 96 accord with 5 speed swap, obd1 auto witing harness no spark, after reading the forum only thing i can think of is the ground on the thermostat..

Heres why, i had tthe obd2 wiring harness and wheni took it off to put the obd1 auto ecu
There was a ground on the thermostat off the sensor with the green clip next to the themostat. Power wire ran into the harness and the ground went to the housing on the themosat, the auto harness the ground runs with the power into the harness..

Try grouding that ground to the themosta, im goin to try now n see if it fires..

 

[AccordH23Avtec]

Your 97 was the F22 or the F23?

if the F23 you might have to switch pin A15 to 16 b/c that's what I did to get the ECU running (PCB) but you said the Fuel pump is priming so IDK.

 

[AccordH23Avtec]

Sorry not to get the ECU running, but the Fuel pump to prime

 

[langston2005]

Im Running a
96 accord
obd1 f22b1
obd1 engine harness (automatic) 1 extra plug
obd 2 to obd1 conversion harness
obd1 ecu

The car was running on a 96 engine harness that was wired ghetto to run the obd2 ecu with the obd1 motor.
I swapped everything to obd1 now and the motor cranks, i hear the fuel pump prime, i hear the main relay click but no spark.
Im thinking the distributor went out. either the coil or control module???

Anyone hear anything about the main relay on the accord? is it just fuel relay? or is it like the older models crx da and 88-91 that is notorious for going out that has fuel and spark?

Help Please

 

[bikesdl91]

im running obd2 auto harness. with harness obd2 to obd1 adaptor to the ecu.

and i would just replace the dissy and coil with known good one. Thats what i did. but still NO SPARK? anyone know anything else i should check?