91 Integra Intermittent No Start When Hot

The S3 light is an unusual wrinkle, but for hot start problems you should first check out the Main Fuel Injection Relay.

Do a google search on "honda main relay".

Or go to

Mike

That was it. Opened the thing up and resoldered the connections to the clamping diodes. The series clamping diodes generate enough heat to cause the solder connections to go bad over time. Honda should have used silver solder to prevent such a problem.

I found out while troubleshooting that the S3 light blinks when the relay is removed. It's probably detecting whether the relay coil is in circuit... probably with the bad solder joint, the computer thinks that the relay is not there.

Me car runs like a t> >

had the same prob your starter is goin out

Oh my...

I have a 91 teg also...

**exactly** where is the main relay? Is it in one of those typical aluminum boxes and you just need to crack it open to work on the contacts?

Thanks very much for the advice!

--Steve

PS the car is also 'surgy' when at part throttle sometimes, sometimes when cold sometimes when hot...I am thinking this is the same issue--am I correct?

"Steve" wrote in news:- snipped-for-privacy@comcast.com:

on the left side of the driver's footwell,up underneath the dash.

no,it's plastic cased,and snaps off easily. Resoldering is easy,saves you at least $50. Check tegger.com for info and pix. also;

Jim Yanik wrote in news:Xns96B8C66F6560Bjyanikkuanet@129.250.170.83:

That URL is outdated. The new URL:

Hi Steve, you pretty much need to pull the lower left dash panel which contains the coin box. The relay is located behind the location of the coin box. An M10 bolt holds it and the turn signal relay together. You will see a vertical post where they are bolted to. You will also need to remove the bolts on the left side of the dash support and pull it down to access the bolt. The main relay is a brown box about 2.5" x

1.5" x 1.5" with 8 connections on it.

The relay's casing is snapped on. You can remove it. I found that the connections did not look bad. I ended up reslodering all of the connections but the bad connection was the one to one of the clamping diodes. If you can find silver solder, use it. Silver solder will prevent future failures. Once you resolder it, spray the circuit board with a couple of coats clear lacquer. Let it dry and then pop the cover back on.

Probably not related to the relay. Could be the throttle position sensor. Could be the map sensor. A vacuum leak can even cause this. Check and see if your computer has thrown a fault code.

Heh... NOW you post a link :-)

You will also have to pull the passenger side lower panel off and the center console in order to get to the screws on the driver's side lower dash panel......

Good Luck

El Chico Gordo wrote:

I only had to pull the driver's side lower dash panel. It was held on by a few phillips head screws. WHen I'm talking the lower panel, I'm talking about he one which houses the coin box.

Cheers

On my Integra...the center console covered the screws for the drivers side lower panel, and the passenger side lower panel covered the screws for the center console......so I had to remove both + the drivers side lower panerl. It was not big deal to me. I have taken those panels off many times.........relay, radio, blower motor etc.....:).

El Chico Gordo wrote:

"B.Creech" wrote in news:Yh9Oe.18871$ snipped-for-privacy@twister.southeast.rr.com:

On my 94 Integra GSR,I only had to remove the driver's side lower panel to get at the MR. It was easy. No touching the center console.

Jim Yanik wrote in news:Xns96BA6245C1C42jyanikkuanet@129.250.170.85:

For the '90-'93, no center console removal needed, just the knee bolster.