2007 Impreza 2.5 i

fl2006scooby · 11-30-2019, 01:45 AM

I bought a 2007 Impreza 2.5i. Since day one I bought it, it won’t start. I have checked the timing belt it’s fine. I changed the crankshaft sensor. Waiting in cam sensor to see if it’s that. I also tried to see if I have spark on the spark plugs but I don’t see no spark. What can it be. I don’t want to pull the heads to see if the valves are bent?

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Muffin15 · 11-30-2019, 11:12 AM

Whoa there, are you just throwing sensors at it hoping one of them will take care of it? While that might end up being the case you're just throwing money at it without actually diagnosing what the problem is.

Does it crank? Does it not crank? Do you hear the fuel pump prime? Do you have any idea of the car's history as to how long it's been like that? Any codes if you scan it? I think it would be wise to collect some information as to what you know is good before you start replacing things. While a bad valve is going to keep it from running well you should at least still get some ignition from it if that is the case

metalmuskee · 12-02-2019, 03:19 PM

What's the mileage on it.

SubieIOSGal · 12-04-2019, 12:18 PM

It's hard to diagnose the issue with what you've posted. I agree with the other responders that sensors may not be the issue, and we need more info before we're able to help much.
Start with basic ignition and electrical system first.
First, try simple diagnostics.
Does engine turn over?
Do you hear a clicking sound?
Do you hear a grinding sound?
Turn key to "on" position - do the dash lights come on?
If you have access to a OBD2 scan tool, and if the dash lights come on, hook up the scan tool.
Use a battery tester to check that the battery isn't dead.
Check the fuse boxes for damage or missing fuses.
If this is a manual, be sure to depress the clutch pedal *all* the way to the floor when trying to crank. I made this mistake on my '05 IOS! There is a clutch pedal switch that prevents the car from starting unless the clutch pedal is fully engaged. I thought my battery was dead, alternator fried, fuse blown... I had just not pushed in the clutch quite far enough. *embarrassment*
Also, I'm assuming you've already done this but if not: Check the fluid levels before trying to start it. Oil, coolant, and check transmission just to be sure some fluid is there (it won't read right unless the car is actually running).
Let us know what you find out!

Wolficus · 12-04-2019, 12:30 PM

Have you checked the coil pack to make sure its good? If the motor spins when trying to start.. I would check that since your not getting spark.

Jack · 12-04-2019, 01:01 PM

You need 3 things, right? Fuel. Have you verified the injectors are at least getting trigger pulses and power? Spark. You say you have no spark. Ok. Why? Are there codes? Did this ever run? If so, something went wrong. You have to figure out what. The third thing is compression and if all the valves were stuck open, you wouldn't get that.

11-30-2019, 01:45 AM	#1
fl2006scooby Scooby Newbie Member#: 227309 Join Date: Oct 2009 Chapter/Region: South East Location: Miami, FL Vehicle: 2010 STI Hatch Obsidian Black	2007 Impreza 2.5 i I bought a 2007 Impreza 2.5i. Since day one I bought it, it won’t start. I have checked the timing belt it’s fine. I changed the crankshaft sensor. Waiting in cam sensor to see if it’s that. I also tried to see if I have spark on the spark plugs but I don’t see no spark. What can it be. I don’t want to pull the heads to see if the valves are bent? * Registered users of the site do not see these ads.

12-04-2019, 12:18 PM	#4
SubieIOSGal Scooby Newbie Member#: 507436 Join Date: Oct 2019 Chapter/Region: Tri-State Location: Earth Vehicle: 2005 Impreza Otbk Sp Silver	Diagnostics It's hard to diagnose the issue with what you've posted. I agree with the other responders that sensors may not be the issue, and we need more info before we're able to help much. Start with basic ignition and electrical system first. First, try simple diagnostics. Does engine turn over? Do you hear a clicking sound? Do you hear a grinding sound? Turn key to "on" position - do the dash lights come on? If you have access to a OBD2 scan tool, and if the dash lights come on, hook up the scan tool. Use a battery tester to check that the battery isn't dead. Check the fuse boxes for damage or missing fuses. If this is a manual, be sure to depress the clutch pedal all the way to the floor when trying to crank. I made this mistake on my '05 IOS! There is a clutch pedal switch that prevents the car from starting unless the clutch pedal is fully engaged. I thought my battery was dead, alternator fried, fuse blown... I had just not pushed in the clutch quite far enough. embarrassment Also, I'm assuming you've already done this but if not: Check the fluid levels before trying to start it. Oil, coolant, and check transmission just to be sure some fluid is there (it won't read right unless the car is actually running). Let us know what you find out! Last edited by SubieIOSGal; 12-04-2019 at 12:23 PM. Reason: Adding a step to depress clutch pedal all the way to floor if a manual.

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11-30-2019, 11:12 AM	#2
Muffin15 Scooby Newbie Member#: 326958 Join Date: Jul 2012 Chapter/Region: NESIC Location: Portland, Maine Vehicle: 2006 Impreza WRX San Remo Red	Whoa there, are you just throwing sensors at it hoping one of them will take care of it? While that might end up being the case you're just throwing money at it without actually diagnosing what the problem is. Does it crank? Does it not crank? Do you hear the fuel pump prime? Do you have any idea of the car's history as to how long it's been like that? Any codes if you scan it? I think it would be wise to collect some information as to what you know is good before you start replacing things. While a bad valve is going to keep it from running well you should at least still get some ignition from it if that is the case

12-02-2019, 03:19 PM	#3
metalmuskee Scooby Newbie Member#: 508957 Join Date: Dec 2019	What's the mileage on it.

12-04-2019, 12:30 PM	#5
Wolficus Scooby Newbie Member#: 146738 Join Date: Apr 2007 Location: St louis Vehicle: 2006 2.5i wagon black	Have you checked the coil pack to make sure its good? If the motor spins when trying to start.. I would check that since your not getting spark.

12-04-2019, 01:01 PM	#6
Jack Add Lightness Moderator Member#: 13699 Join Date: Dec 2001 Chapter/Region: NESIC Location: Hopkinton, MA Vehicle: not my president (From General)	You need 3 things, right? Fuel. Have you verified the injectors are at least getting trigger pulses and power? Spark. You say you have no spark. Ok. Why? Are there codes? Did this ever run? If so, something went wrong. You have to figure out what. The third thing is compression and if all the valves were stuck open, you wouldn't get that.