4th Gen JDM - 10A PGM-FI Fuse Keeps Blowing on Ignition?

arif_manji · Post by **arif_manji** » Mon May 15, 2017 8:36 am

Hi Guys,

I've recently purchased a very early JDM 4th Gen (H22a LSD Auto with TCS - very rare). I bought it as a non runner, the car was due to be scrapped by the previous owner that day before I enquired about it and bought it. The previously owner said the car was running fine, they had removed the battery for another car for 13 months. After that, they put the battery back in and nothing was happening.

Anyway firstly, it had a dodgy immobiliser which I removed and soldered the ignition wires back to original. It was connected directly to the ignition, not the fuel relay (what some alarm/immobiliser fitters do. Once that was off, the ignition came on perfectly.

I then noticed I couldn't hear the fuel pump prime. I checked the fuse and found it had blow (fuse 4). So I changed it turned on the ignition and it blew again. I then replaced the fuel main relay and it did the same again.

I have had a quick scan over the earths in the engine but couldn't find anything obvious. I'm due to have a thorough look next Friday.

Has anyone else ever had this problem? I really want to save this one, its in good nick and definitely too good to break. Any suggestion and advise will be appreciated.

Cheers

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon May 15, 2017 9:26 am

Without checking the manual to see what else is fed off that fuse (don't have access to it right now) it sounds like it would be worth checking the fuel pump hasn't gone low resistance/short, or the cables to it chaffed and gone to ground etc.

arif_manji · Post by **arif_manji** » Mon May 15, 2017 9:56 am

wurlycorner wrote:Without checking the manual to see what else is fed off that fuse (don't have access to it right now) it sounds like it would be worth checking the fuel pump hasn't gone low resistance/short, or the cables to it chaffed and gone to ground etc.

I did take out the fuel pump from the tank and tested it, looks all fine - very clean pump for the age of the car. Tested the pump, connector and also against another pump i took out from a breaker. There no mods on this car apart from the exhaust system - its totally stock car.

arif_manji · Post by **arif_manji** » Mon May 22, 2017 10:06 am

Found the issue, faulty fuel relay which kept blowing the fuse! Started within one crank, amazing for a car that's been standing for over a year. Another Prelude saved from the crusher, and an amazing spec one too!

arif_manji · Post by **arif_manji** » Mon May 22, 2017 10:22 am

Some pictures

The arches are strong, slight bubble at the bottom of the sill but arches and great! Drivers door has a scrape but apart from that, its in very good condition! 4WS works fine and drives amazing! Next stop, Matt @ Red-R Performance for cambelt and full service!

firstlude · Post by **firstlude** » Mon May 22, 2017 10:08 pm

god damn it why are these bargains never near me i am well jealous

arif_manji · Post by **arif_manji** » Tue May 23, 2017 7:54 am

firstlude wrote:god damn it why are these bargains never near me i am well jealous

This was in Stoke-on-Trent - was little bit away from me but was worth it, plus got a good buddy with a transporter

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Fri May 26, 2017 12:42 pm

Excellent news, well done.

Same spec/colour as lisa's, when I bought that (except hers manual)