chgeorge

Alright its come to the point that I have to post my problem. Now before everyone goes "Oh dear god another one of these...", let me explain everything I've done. I own a 1994 honda civic del sol s (D15B7 OBD1)

Now when I say "Awhile to prime" I mean I sit and wait for the fuel pump to kick on for 2 seconds. The fuel pump is NOT running continuously.

First of all, the symptoms:

(1) The car would occasionally start up and then immediately die when I got gas. It would prime but then die.
(2) In rainy or humid weather the car would take awhile to prime
(3) We had a long period of rain that seemed to take the final toll on my car and now the car always takes awhile to prime (the time it takes to prime STRONGLY correlates with how long its been sitting. 1 hour takes like 30 sec to prime)
(4) The relay clicks once in the ON II position, which indicates that the first relay gets power
(5) The car will crank and crank (I get spark)
(6) Once started, the car runs perfectly fine
(7) Minor fuel economy drop (might be my driving but could hint at something else)

What I've done:

-I've researched the hell out of this problem and followed many many threads about similar issues (and I noticed that Ron was at the forefront of most of these threads so I've finally come to the big man himself)
-New ECU (autozone...under warranty)
-Re-soldered main relay and bought a new one
-Checked all fuses (especially ECU, Back up, and the 7.5A under the dash...remember I've checked all of them twice)
-Cleaned contacts on ignition switch
-Checked all power points on main relay and they are what they are supposed to be at
-Re-sanded G101 twice, Battery Ground, Transmission Ground
-ECU Testing (At the ECU pins)...
(a)The grounds at the ECU are good
(b)Power to the ECU is good
(c)If I ground the wire (Off the top of my head its the G/Y...) the fuel pump kicks over and this is from the ecu pin
(d)When the fuel pump does kick over, I confirmed the G/Y is grounded out
-The 4 injectors, MAP, EVAP and IVAC all get power...doesn't mean they're good though
-Spark plug test (I get spark)


So my thoughts as of now...
It seems like something is telling the ECU not to put my car into some sort of start mode to prime my fuel system. I thought it was a short but I'm not sure how. And since it directly correlates with the time it sits I'm not sure what it could be (I initially thought the fuel pump capacitors in the ECU but after switching the ecu its obviously not that). Could it be something with the fuel system?

Or a sensor within the distributor? The rotor and cap were swapped out 2 years ago. I only mention this because I just tested spark again and its giving me a blue spark...not white like Ron's Sig mentions.

Thank you so much ahead of time for the help. Its my daily driver and I commute to school every day. I'm on break for 4 weeks so hopefully I get it resolved before I drive back down to cal poly 300 miles away haha.

Christian

Hondaguy83

Moisture is getting in the cap during these bad weather conditions.

Hondaguy83

2.Check main relay.

chgeorge

Ok, please read through my original post. I re-soldered and replaced the main relay. Would anything in the cap not cause the car to prime though? and make me wait?

chgeorge

I pulled apart the dizzy and the screw for the ignition output signal was dirty. The contact looked fine though. Resanded it and problem persists.

I also tried grounding out the fuel pump from the ecu (fuel pump ran) and starting the car but it didn't pop over. Its as if the the fuel is being blocked and the injectors aren't firing because the ecu senses something is wrong.

Hondaguy83

Spray starting fluid in throttle body then try cranking over. If it don't start it's the ignition system. Could be poor spark, bad igniter or coil,maybe cam sensor or crank sensor.

delsolintegra

Did you change the fuel filter and also the fuel pump sediment screen (in the gas tank) ?

I've had this problem also with a 93 del sol SI but in my case it was the ECU.

Hondaguy83

Weak spark, could be distributor or change your spark plugs cap ,rotor n wires since Change them two years ago. do that first.

jdmem205

iTrader: (2)

If he has spark as he stated why would it matter if it seems like it's the fuel pump not kicking the fuel to the injectors?

Hondaguy83

If you did bypass the ecu an grounded the pump yourself then you would have fuel pressure. You said it still didn't start.

If your thinking its the injectors not firing. You can spray starting fluid in to rule out that possibly of the Injectors not firing if it starts up with starting fluid when sprayed in the throttle body. Or use a noid light to see injector pulsation or back probe the injector wire with a test light. Be a good idea to measure voltage going to the wires also.

Hondaguy83

Make sure the fuel pressure in in spec.

If starting fluid makes your car starts and everything checks out fine.
I would have to say your injectors don't know when to fire. Could be crank sensor

If starting fluid doesn't make your car start, and fuel system checks out fine my best bet is ignition problem such as poor spark or have spark but don't know when to fire such as cam sensor going bad etc.

Hondaguy83

Dude sold u a bogus ecu if u bypass the FUEl pump and it starts

delsolintegra

Borrow a known good ECU

Hondaguy83

Test for ground at a7 n it should ground relay while cranking. If not, bad ecu or bad ground some where. If that checks out fine trace wire back to relay and it should ground t relay. Might have a loose connection somewhere