My experience with the PGM-FI main relay problem was it would die under one of two scenarios: 1.) recently drove the car and parked it only to come back to a no-start situation and 2.) car sat in the hot sun and no start- rolled down the windows and five minutes later it started right up.
The PGM-FI Main Relay pinout in the Helms schematic shows a black/yellow lead that goes directly to the fuel pump (the center of the problem- it cuts it off). I don't see any direct line from the relay to the ignition coil, but several lines go to the ECU so perhaps without proper signals from the relay, the ECU cuts off voltage to the ignition coil as well. Can anyone confirm this? George '89 DX-Hybrid-D16Z6, 120k miles "Seats, Suspension, Engine, next=MSD" -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Lee & Tracy Grimes Sent: Thursday, June 06, 2002 11:42 PM To: David Miller; [EMAIL PROTECTED] Subject: CRX: main relay continued You may have identified a problem I had yesterday in the '89 Si ZC street car. I have never dealt with any main relays in any of my CRXs over the years but had an odd one yesterday that my just be my turn. The car has sat in the air conditioned garage for the last two weeks while we were on vacation then started immediately for the first day back to work. When ready to go to lunch on a pretty hot and humid day, the engine would crank over freely but no the least bit of kick or fire. I checked and found no spark at #1 or #4 cyls. I have a new distributor in it and was afraid that was the problem but had no chance to check it. That afternoon, we had a deluge rain storm cool things off and just as I was about to leave the car overnight and ride home with someone, I tired the ignition just by chance. It cranked about 3 seconds then started and drove home good as new. haven't touched it since then and drove the truck to work. Would this main relay failure allow the engine to crank freely but eliminate all spark? Is there a test to see if one is bad (may have a used spare hanging around)? With 202,000 miles I certainly can't fault a relay for dying now with no previous trouble ever. Lee ----- Original Message ----- From: "David Miller" <[EMAIL PROTECTED]> To: "Robin Turner" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Thursday, June 06, 2002 9:28 AM Subject: CRX: RE: civic won't start > If you roll down the windows, wait about 15 minutes, and try again, and it starts, then you have a bad main relay. > > Cost ~$40-$50 from Honda dealer. It is located on the side wall behind your coin box. Easier to get to if you remove the coin box first! > > Just remove and unplug the old one, and plug in the new one. > > Just my $0.02 > > David Miller > [EMAIL PROTECTED] > '89 CRX DX, white, 196K miles > '90 CRX Si, yellow, 47K miles > '02 Civic EX, ruby, 10K miles > > > > -----Original Message----- > From: Robin Turner [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, June 05, 2002 5:59 PM > To: [EMAIL PROTECTED] > Subject: CRX: civic won't start > > > > My girlfriend drives a '90 civic, when it gets hot/humid her car will not > start. If anyone might know what the problem is that would be a great help > to me. > > Thanks, > Turnercrx > > _________________________________________________________________ > Join the world's largest e-mail service with MSN Hotmail. > http://www.hotmail.com >
