Need help badly!!

95GTS · 02-02-2001, 12:58 PM

Before we installed the new fuel pump the fpr that the previous owner had on the car would adjust the pressure just fine but then after you drove the car a little bit the pressure would drop back down to 25 psi as I had in the above post. Then after the new fuel pump was installed the fuel pressure skyrocketed and couldn't be brought back down. Also makes it hard to adjust the pressure with it idling irradically. Whenever the rpms would come back down the pressure registered 55 and would not go any lower. So we replaced the adjustable fpr with another one and still the same results. Vaccum disconnected.

Like I said in the previous post we are not sure of the size of the MAF and if it is for sure calibrated for the 24 lbs injs. The car does have 24 lb injectos. We are assuming that it is but can't get ahold of the previous owner to find out. Thanks for the idea of the putting in of a buddies MAF to check. (Johnny, we need to do that

) We'll have to try that.

We'll check the harness, too. O2s are good. One is brand new. Nothing shows on a scan.

------------------
1996 Mustang GTS

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02-02-2001, 12:58 PM	#4
95GTS Git jiggy Join Date: Oct 1999 Location: MO USA Posts: 865	Before we installed the new fuel pump the fpr that the previous owner had on the car would adjust the pressure just fine but then after you drove the car a little bit the pressure would drop back down to 25 psi as I had in the above post. Then after the new fuel pump was installed the fuel pressure skyrocketed and couldn't be brought back down. Also makes it hard to adjust the pressure with it idling irradically. Whenever the rpms would come back down the pressure registered 55 and would not go any lower. So we replaced the adjustable fpr with another one and still the same results. Vaccum disconnected. Like I said in the previous post we are not sure of the size of the MAF and if it is for sure calibrated for the 24 lbs injs. The car does have 24 lb injectos. We are assuming that it is but can't get ahold of the previous owner to find out. Thanks for the idea of the putting in of a buddies MAF to check. (Johnny, we need to do that ) We'll have to try that. We'll check the harness, too. O2s are good. One is brand new. Nothing shows on a scan. ------------------ 1996 Mustang GTS