phillyxj570

tomorrow morning im going to swap my injectors for the neon injectors i got from the jy...i know they are a direct swap but is there anything i need to do to the neon ones b4 i put them in the xj

p.s. i know that everyone says they have to be #703...the ones i have are #740....they are the same size and have the same exact plug ans my injectors in my xj. will the 740's work or do they have to be the 703's

Bustedback

Check the length of the 740s, they may be too short. You should also clean them out before installing them. I used brake cleaner to clean mine. I put a piece of fuel line on the rail side of the injector and filled the hose with brake cleaner, then I put voltage to the injector to open it up while blowing through the hose. Just don't inhale while doing this.

phillyxj570

thanks for the input

Programbo

The 740's won't work correctly. They come from the same year Neons as the 703's and look exactly the same but are about a half inch shorter. There MIGHT be a way to get them to work but not by having the injector rail bolted down in it's original position.

phillyxj570

alright thanks alot bro i guess i will be headed to the jy in the morn to try to find some 703's

Jeep, Ride XJ

if there is any difference..what is it? between a 4.0L H/O. and a 4.0L. I believe it is the injectors, or did they just stop puttin the High Out put Emblem on the xjs in the newer years.. i always wondered. but didnt know exactly

Bustedback

All 91 and newer 4.0 engines are H.O. engines.

Programbo

Make sure you don't limit your search to Neons. The 703's were in all kinds of Dodge and Chyrsler cars in the 95'-97' range.

phillyxj570

Ok i went to the jy this morning and got a set of 703's out of about 15 dodge/chrysler fuel rails ripped off i finally found to dodge stratus with 703's will be putting them in tomorrow morning

phillyxj570

when i do the swap should i pull the fuel pump relay and run the jeep till it dies or no

Bustedback

Just release the pressure from the test port.

phillyxj570

thanks

Jeep, Ride XJ

yeah i know, but whats the difference between the jeeps that are high out put.. and the ones that are just 4.0L.

Bustedback

90 and older Jeeps had restrictive exhaust ports and some other little details, plus they had the Renix engine management system. The 91 and newer 4.0 engines have better flowing heads and Chrysler engine management. The difference in horsepower is about 20hp over the 90 and older non-HO engines.

phillyxj570

alright i put the 703's tonight and now unless i give it gas it sounds like its going to stall out...is that normal or not ?