car won't run will start
05-03-10, 04:23 PM
#1
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car won't run will start
Hrmmm so okay im still a rotary noob but i got the car to start with some starting fluid and the compression is around 98-100 and i replaced the fuel pump, new battery, im guessing its the fuel injectors? so i did order some remanufactured injectors if anyone had the same problem please help i wanna get my baby running :\
05-03-10, 09:46 PM
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sorry its a 1988 GXL i bought the car not running and a rebuilt engine and i wanna know if either A. my car isn't starting because fuel injectors B. or someone can help me address the reason why it may not be running
05-03-10, 10:21 PM
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i have a similar problem... just bought my second fc and its having trouble staying started. i noticed the oil pressure gauge is at the top of the gauge and from what the guy i bought it from said he took out the cold start assist. the car will start everytime with no problem, rev up to 3 grand like its supposed to and then die out. if i keep my foot on the throttle it will stay running and the car can even be driven if i keep on the gas pedal. i havent gotten a good chance to check the car out since i couldnt drive it home so im going to pick it up this weekend. from what i have researched so far it can be a vacuum leak, bad afm, tps needs to be adjusted, clogged cat, leaking fuel injectors, or bad fuel pump... any help??
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05-04-10, 05:09 PM
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rotaryrocket and saks, is that meant for rotaryforme or me? im thinking i have a fuel delivery problem such as the fuel pump not turning on or leaking injectors, maybe a bad AFM, vac leak, tps needs adjustment. just trying to get as much info as possible so its alittle easier to pinpoint the problem. i rememer reading somewhere on the forum about a similar problem that turned out to be a gasket leaking on the upper intake manifold
05-05-10, 04:53 AM
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I put the fuel preserver I don't know exactly what it's called but when my friend sprayed the starter fluid and cranked it would start just wouldn't run so I'm guessing I have to get new fuel injectors? I have spark compression fuel compression
05-05-10, 03:57 PM
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or your fuel pump could not be turning on when it should. could also be the AFM since it has a relay or something that triggers the fuel pump when the car starts
05-06-10, 11:50 AM
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Cab, that was meant for rotaryforme but I think you both might have to replace the injectors and see what that does for ya. If it fixes it, good. If not, come back here
05-06-10, 02:34 PM
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Check the fuel pressure (test set at HF, $16). Observe the fuel pressure during a start with the starter fluid. If it falls off after start, it is likely the fuel filter or pump. If that is good, check the primary fuel injectors for flow; there is a procedure in the FSM. If the flow is good, replacing the fuel injectors probably will not solve the problem, though it is likely a good thing to do anyway.
Last edited by calpatriot; 05-06-10 at 02:35 PM. Reason: content revision
05-22-10, 04:09 PM
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done everything i can got new fuel rails injectors in still won't run im guessing could be electrical problems? cause the injectors are getting NO power... so should i just get a new wiring harness?
05-22-10, 04:45 PM
#15
u know the injectors have no power to them cause u've diagnosed this, correct? replaced the fuel pump so u know this one works cause the other on didn't? new battery cause the other one wouldn't hold a charge? u just guessing/replacing things hoping to find the right problem? u said in ur first post u were guessing it was the injectors. if in deed the injectors aren't getting power, u'll need the fsm which wires in the loom should have +12v on them, and trace them back to make sure the ecu is doing it's job. maybe the ecu isn't getting the necessary signal from the cas.
05-23-10, 04:44 AM
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i have a hanes manual will that work? and how can i check if the ecu is getting signals from the CAS?! i was guessing i probably need a whole new wiring harness cause the previous owner did some ****** shitty wiring had to sauder a lot of em such as the main relay... so iono..
Last edited by rotaryforme; 05-23-10 at 04:52 AM.
05-23-10, 09:37 AM
#18
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you dont need a new harness..you can resolder them. just make sure you do a decent job and put some heat shrink tubing over the connection.
also i noticed in the email notification you said the main relay works because you're getting spark..isn't there 2 sides to it? one activates ECU and one activates the fuel pump? i could be wrong here but i think i read that somewhere.
anyway test it yourself, its easy. don't just assume it works.
also i noticed in the email notification you said the main relay works because you're getting spark..isn't there 2 sides to it? one activates ECU and one activates the fuel pump? i could be wrong here but i think i read that somewhere.
anyway test it yourself, its easy. don't just assume it works.
05-24-10, 01:50 AM
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you dont need a new harness..you can resolder them. just make sure you do a decent job and put some heat shrink tubing over the connection.
also i noticed in the email notification you said the main relay works because you're getting spark..isn't there 2 sides to it? one activates ECU and one activates the fuel pump? i could be wrong here but i think i read that somewhere.
anyway test it yourself, its easy. don't just assume it works.
also i noticed in the email notification you said the main relay works because you're getting spark..isn't there 2 sides to it? one activates ECU and one activates the fuel pump? i could be wrong here but i think i read that somewhere.
anyway test it yourself, its easy. don't just assume it works.
Last edited by rotaryforme; 05-24-10 at 02:06 AM.
05-24-10, 05:52 PM
#20
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obviously i mean resolder whatever connections are failing...you don't need to replace the harness because a wire or 3 isn't working lol...you don't need to know rotaries to realize that.
05-24-10, 06:57 PM
#21
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first of all your being very vague by saying resolder "them" and 2nd of all main relay is what gives coils power to your spark plugs and i did test them and fuel pump has compression its fine dude if you dont know what your talking about its better not trying to help someone with such vague descriptions i know im a noob at rotarys but you have NO IDEA what you are talking about so dont even try to help
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