86 prelude 2.o SI has no spatk and no PGM-FI light. how do I test the circut for that light

"All Honda engines are Interference except 3.0L & 3.2 which are Non-Interference."( but does not cover year 1990,) so is lie. (all means modern, not 1990)
not told which 2.0L is there VIN or country.
the names of gen3 car engines is here.
IN USA (are you) we had the SOHC and DOHC engines. both,(options)
they year some are.
in Gas world, DOHC are mostly interference.
there exceptions


B20A/B20A1 - 2.0L DOHC PGM-FI 160/143 PS (Japan/Europe)
B20A3 - 2.0L SOHC 12v carb 104 hp North America


B20A4 - 2.0L SOHC 12v carb 114 PS (84 kW)Global, except North America
B20A5 - 2.0L DOHC PGM-FI 135 hp (101 kW) North America (interference engine)
B20A6 - 2.0L DOHC PGM-FI 142 PS (104 kW) Oceania
B20A7 - 2.0L DOHC PGM-FI 150 PS (110 kW) Europe, New Zealand
B20A8 - 2.0L DOHC PGM-FI 133 PS (98 kW) Europe
B20A9 - 2.0L DOHC PGM-FI 140 PS (103 kW) Europe
B21A - 2.1L DOHC PGM-FI 145 PS (107 kW) Japan (SI States)
B21A1 - 2.1L DOHC PGM-FI 140 hp (104 kW) North America

the truth is,
we put on a new belt and do leak down test.
if fails look for bent valves.
NO belt there test.
or super brave and by HAND only
put crank and TDC mark 0 zero. at damper pulley edge scale
turn the cam cog wheel (cam) by hand, with socket wrench feel of valves hit. ( all interference engines will)
VVT on newer car is more complex answer but not here.
there is always luck.
belt slips a bit , retardds the cam and stalls before it hits. luck happens, like walking a cross a city street blind folded, I say why even ask, just do it.
most DOHC engines with 10:1 compression ratio are interference, but if is the turbo version those are not.
mostly, (vast engines types exist, and nobody knows that it seems)

if you watch a 4cycle engine simulator
see how the piston chases the exhaust valve closed
the piston wins, on some engines it bends it.
some engines with notched piston tops are free running engine.
also honda's this old had the B20B swap put in.
only you can read engine serials. b20b is interference.
Do I have to say do not crank any engine for sure on any DOHC if the belt fails.(slips or snaps)
do a leak down test. not cranking,
my mazda mx5 had 1.8 Liter, free running, engine
but was turbo version but no turbo fitted new.
had low natural compression . see?
One guy had DOHC engine and the PO wrecked the DOHC head and put on the SOHC head. (FREE RUNS)
33 YEARS OLD THINGS HAPPEN

stalls. ( ever tune it up,at the 60k service points? )
what year, no year , no joy, 1978 to 2001 , lots huh?

and what engine option, displacement (size)

over 10 engines
Third-generation Honda Prelude engines:
B20A/B20A1 - 2.0L DOHC PGM-FI 143/160 hp (Japan/Europe)
B20A3 - 2.0L SOHC 12v carb 104 hp North America
B20A4 - 2.0L SOHC 12v carb Global, except North America
B20A5 - 2.0L DOHC PGM-FI 135 hp (101 kW) North America
B20A6 - 2.0L DOHC PGM-FI 142 hp (106 kW) Oceania
B20A7 - 2.0L DOHC PGM-FI 150 hp (110 kW) Europe
B20A8 - 2.0L DOHC PGM-FI 133 hp (99 kW) Europe
B20A9 - 2.0L DOHC PGM-FI 140 hp (100 kW) Europe
B21A - 2.1L DOHC PGM-FI 145 hp (108 kW) Japan (SI States)
B21A1 - 2.1L DOHC PGM-FI 140 hp (100 kW) North America

Check your main fuel relay.



Fuel Supply System


PGM-FI Main Relay


Description


This PGM-FI main relay is located behind the dashboard


lower cover. The PGM-FI main relay actually contains


two individual relays. One relay is energized whenever


the ignition is on. It supplies battery voltage to the PCM,


power to the fuel injectors, and power for the second


relay. The second relay is energized for 2 seconds when


the ignition is switched on, and when the engine is running.


It supplies power to the fuel pump.


PGM-FI


MAIN RELAY



FUEL


PUMP


RELAY


Relay Testing


NOTE: If the engine starts and continues to run, the PGMFI


main relay is OK.


1. Remove the PGM-FI main relay.


2. Attach the battery positive terminal to the No. 3*


terminal and the battery negative terminal to the


No. 2* terminal of the PGM-FI main relay. Then


check for continuity between the No. 5* terminal and


No. 2 terminal of the PGM-FI main relay.


• If there is continuity, go on to step 3.


• If there is no continuity, replace the relay and


retest.



*: 8P CONNECTOR


To FUEL PUMP


3. Attach the battery positive terminal to the No. 4 terminal


and the battery negative terminal to the No.


7* terminal of the PGM-FI main relay. Then check


that there is continuity between the No. 3 terminal


and No. 1 terminal of the PGM-FI main relay.


• If there is continuity, go on to step 4.


• If there is no continuity, replace the relay and


retest.


4. Attach the battery positive terminal to the No. 1 terminal


and battery negative terminal to the No. 2*


terminal of the PGM-FI main relay. Then check that


there is continuity between the No. 5* terminal and


No. 2 terminal of the PGM-FI main relay.


• If there is continuity, the relay is OK;


If the fuel pump still does not work, go to Harness


Testing on the next page.


• If there is no continuity, replace the relay and


retest.



To PCM CONNECTOR


TERMINAL A4


To ST. SWITCH


To GROUND


To IGN. 1 To BAT


To PCM


CONNECTOR TERMINALS


A13 and B1


FUEL PUMP


RESISTOR


FUEL PUMP

pedal pressure? the throttle sticks< OPEN?
ive never ever seen a post ever for pedal pressure,
what does that mean? im clueless here, and sounds very scary.
to any mech. after all, throttle valves failures, can be man killers.
so.....???
when failed does the engine crank over full speed with the starter?
grrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr fail to start.
that normal sound of a good starter, yes?

is this an intermittent problem only?

NO start, ? (cranks robustly)
no, lets start at step one.
1: check all fuses. in both fuse boxes.
2: are the Headlamps working at full brightness.
3: does all the normal dash cluster lamps glow , key on.
Charge, Brake , Check engine lamp> all glow, if not, stop.
4: spark got spark at all cylinders, (a test)
my guess is engine is flooding, (smells) and is due to
lost spark.
ever do the 60k mile tuneup this decade?


this very old car has relic, warnings, back then.
non standard.

the PGM-FI is early name for CEL, check engine
on this engine you must find the ECU (PGM-FI box)
and see the LEDs on the side.
they can be made to blink secret codes. errrors
these errors will be key to diagnosis, i bet.

here is the clue
http://www.cargurus.com/Cars/Discussion-c9084_ds477362

the cars FSM book covers how to diagnose no starts
or no cranks.

• Basic Fuel System Diagnosis
• Fuel Lines And Fittings
• Fuel Tank
• Programmable Multi-port Fuel Injection Pgm-fi System
• • Fuel Charging Assembly
  • Fuel Injector S
  • Fuel Pressure Regulator
  • Fuel Pump
  • General Information
  • Pgm-fi Main Relay
  • Relieving Fuel System Pressure
  • Throttle Body

• HOME /
• REPAIR HELP /
• 1994 ACURA LEGEND 3.2L FI 6CYL REPAIR GUIDE /
• FUEL SYSTEM /
• PROGRAMMABLE MULTI-PORT FUEL INJECTION (PGM-FI) SYSTEM /
• PGM-FI MAIN RELAY

Acura Coupes and Sedans 1994-2000 Repair Information

PGM-FI Main Relay

Print
This relay is located behind the dashboard's lower cover. It consists of two individual relays. One is energized whenever the ignition is ON , thus supplying battery voltage to the Powertrain Control Module (PCM). This relay also supplies voltage to the fuel injectors, and power to the second relay. The second relay is energized for two seconds, when the engine is turned ON , to power the fuel pump.
See Figure 1

Fig. Fig. 1: Schematic of the PGM-FI relay
Testing
If the engine starts and continues to run, the PGM-FI relay is working and does not need to be replaced.
See Figure 2

Fig. Fig. 2: PGM-FI relay terminal numbers

1. Remove the relay.
2. Apply battery voltage to the number three terminal.
3. Ground the number two terminal.
4. Check for continuity between terminals five and two.
5. If continuity is detected, proceed to the step 7.
6. If there is no continuity, replace the relay.
7. Connect the number four terminal to the positive side of the battery.
8. Ground the number two terminal of the relay.
9. Check for continuity between the number five terminal and the number two terminal of the relay.
10. If there is continuity, the relay checks out "OK". If the fuel pump still does not work, test the harness.
11. If there is no continuity, replace the relay and retest.

sell it

Sounds like you have bad circuit somewhere.
Open the hood and clean up some ground wires.

pull the PGM-FI relay located to the left of the steering wheel way up under the dash.

change the sensor

hey sounds to me like it's the alternator see when the alternator is not working properly the main source of direct energy comes from the battery and when that runs out it makes your car die . then it might turn on again but it does not last. u shuld have you alternator checked to make sure if not ask me again..