My cure for hesitation
#1
My cure for hesitation
I've been having trouble with hesitation for some time now. The car used to stall when I turned or sometimes just driving down the road. I reduced this to mostly just a sudden loss of power by replacing all of the vacuum hoses, but it still would lose all power for an instant at these times and I couldn't figure out why. Also the car was not as powerful as before.
I had checked out the fuel pump pressure and tested the fuel pump relay on the battery as the book suggested. All checked out fine. I just replaced the fuel pump (green) relay on my car on a hunch and it's a new car. It dosn't hesitate or stall and has all of it's old power and poop back. I think the relay was weak and not supplying enough power to the pump or intermitant power. This relay is back by the rear bumper, so the power has to come all the way back front to rear, then go back 1/2 way across the car to the pump. Perhaps There is too much resistance in this circuit to run the relay reliably. Anyway, there are several of these relays for the engine (Computer, Coils, FICD, etc) and at this age they may be weak. As I said, mine checked out O.K. yet was bad. A new one for $15 was the cure.
I had checked out the fuel pump pressure and tested the fuel pump relay on the battery as the book suggested. All checked out fine. I just replaced the fuel pump (green) relay on my car on a hunch and it's a new car. It dosn't hesitate or stall and has all of it's old power and poop back. I think the relay was weak and not supplying enough power to the pump or intermitant power. This relay is back by the rear bumper, so the power has to come all the way back front to rear, then go back 1/2 way across the car to the pump. Perhaps There is too much resistance in this circuit to run the relay reliably. Anyway, there are several of these relays for the engine (Computer, Coils, FICD, etc) and at this age they may be weak. As I said, mine checked out O.K. yet was bad. A new one for $15 was the cure.
#5
Originally Posted by phat
congrats and lucky u for only spending $15
#6
Guest
Posts: n/a
i was having the same problems. but I aso had slight bumps during shifts. i found wires underneith my intake MAF that split from the pigtail and grounded to a littel grey box on my fender. the wires were cut. i connected them and my car was a champ again. congrats on a 15$ fix!
#9
Originally Posted by aminus21
where exactly is the relay?? rear bumper??
I called my 3 dealerships and none of them had it in stock, plus they wanted $25. I wonder if there's a difference btw the green and blue relay.
#10
Relay location
This relay is inside the rear lip of the trunk. You remove the plastic trunck lip liner that the trunk latch runs through and bend back the mouse fur trunk liner under it. The relay is mounted to a bracket on the drivers side of the latch.
#11
Originally Posted by ghostmax
Haven't looked for it yet, but probably in trunk by the latch under the plastic trim piece.
I called my 3 dealerships and none of them had it in stock, plus they wanted $25. I wonder if there's a difference btw the green and blue relay.
I called my 3 dealerships and none of them had it in stock, plus they wanted $25. I wonder if there's a difference btw the green and blue relay.
#12
I replaced the green relay (pn 25230-c9965) with a spare fog blue relay I had (pn 25230-c9970) which looks essentially the same, wonder if they are interchangeable. So far no hesitation around corners, but I haven't noticed a huge difference in power. As long as I don't stall anymore I'll be happy! Thanks again for the tip.
#13
Originally Posted by ghostmax
I replaced the green relay (pn 25230-c9965) with a spare fog blue relay I had (pn 25230-c9970) which looks essentially the same, wonder if they are interchangeable. So far no hesitation around corners, but I haven't noticed a huge difference in power. As long as I don't stall anymore I'll be happy! Thanks again for the tip.
#14
another thing... for those of you that have done a lot to the engine, it certainly wouldn't hurt to run new and larger wire to the fuel pump from the battery. 10awg wire is cheap and certainly wouldn't hurt to have in there.. do that and replace it with a quality aftermarket 40A relay and you'll be golden.
#16
Originally Posted by beespot23
did this solve ur problems by replacing the relay
My hesitation is probably the coil packs although none of them have cracks. Other guess would be O2 sensor which I will replace soon since I haven't done that since I bought the car 3yrs ago.
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