Starting issue with my 91MTX

[jkichline]

It starts with no problems cold. Most of the time, after I've run it for a little, come back to restart, I have to give it full throttle to start it. I don't get a CEL. I thought maybe dirty MAF sensor so I dumped a can of electronics cleaner on it and got no change. It runs fine after I get it started. I've done the upper and lower 60K's about 3K ago. I'm not sure what's going on here.

 

[AREA 91]

Check your fuel pressure at the fuel rails. If you have to "floor" the throttle to get it to start, it sounds like you have a leaky injectors. The fuel pressure test should point you in the right direction.

 

[spiegeltuxer]

My 91 has the same issue. I turn the key and listen to the fuel pump. A higher whine tells me there is not enough pressure on the initial prime it sends. I turn the key a second time without starting the car and you can hear the fuel pump tone drop lower. Thats when I crank the starter and she starts right up. Let the fuel pump do the work like it should and turn the key twice without turning it to engage the starter. I dont want to take the time to put in a new check valve.

 

[jkichline]

Now its really not running.

My fuel pump is not priming and I just had it towed home. I looked for fuses and relays and didn't find any. Looks like I'll be putting a new one in this weekend. Any advice? How hard is it to do? Luckily, I happen to have a spare fuel pump in my garage. It doesn't look to hard but I don't know how hard it is to get to.

 

[YAHTEC]

My 91 has the same issue. I turn the key and listen to the fuel pump. A higher whine tells me there is not enough pressure on the initial prime it sends. I turn the key a second time without starting the car and you can hear the fuel pump tone drop lower. Thats when I crank the starter and she starts right up. Let the fuel pump do the work like it should and turn the key twice without turning it to engage the starter. I dont want to take the time to put in a new check valve.

The check valve is built into the pump