1998 Volvo V70 will not start after plugs, cap, rotor Topic is solved

WhatAmIDoing · Post by **WhatAmIDoing** » 26 Nov 2018, 14:56

Based on the initial symptoms, it sounds like you have the wires wrong. But you say you triple checked them and they are correct. You said it still will not start with all the old stuff back in, so it's unlikely the new is bad. If she won't fire on starting fluid, then your problem is compression or spark (by fire I mean starts and dies). If she starts and dies on starting fluid, then it's fuel, and I would bet it is the fuel pump relay. You can buy a cheap tire gauge as a one time use fuel pressure gauge.

If she does not fire, check the coil supply and coil wire. Coils very rarely fail, and usually only fail from being struck or dropped. Also check the ground wire on the engine. Pull all the plugs and ground them to the engine. Make sure all of the spark plugs are firing. Search the forum for "lawnmower syndrome" and try that as well with all the new components back in.

If she fires and dies, pull the fuel pump relay and jump the pins (info on the forum).

My guess is it's either a bad connection or the fuel pump relay.

rarkep · Post by **rarkep** » 27 Nov 2018, 07:07

WhatAmIDoing wrote: ↑26 Nov 2018, 14:56 Based on the initial symptoms, it sounds like you have the wires wrong. But you say you triple checked them and they are correct. You said it still will not start with all the old stuff back in, so it's unlikely the new is bad. If she won't fire on starting fluid, then your problem is compression or spark (by fire I mean starts and dies). If she starts and dies on starting fluid, then it's fuel, and I would bet it is the fuel pump relay. You can buy a cheap tire gauge as a one time use fuel pressure gauge.

If she does not fire, check the coil supply and coil wire. Coils very rarely fail, and usually only fail from being struck or dropped. Also check the ground wire on the engine. Pull all the plugs and ground them to the engine. Make sure all of the spark plugs are firing. Search the forum for "lawnmower syndrome" and try that as well with all the new components back in.

If she fires and dies, pull the fuel pump relay and jump the pins (info on the forum).

My guess is it's either a bad connection or the fuel pump relay.

Thanks, whatamidoing.

When you say to pull plugs to check for spark do you mean to pull all of them at the same time or one at a time?

I will try all of the things you recommended. Has to wait until this weekend, but I will report back.

WhatAmIDoing · Post by **WhatAmIDoing** » 27 Nov 2018, 10:36

Pull all the plugs and ground them to the top of the engine. Forgot to mention, you might want to pull the fuel pump relay so you aren't spraying petrol. Have someone crank the engine while you watch the sparkplugs. Look for a strong spark, consistency, and make sure the firing order is correct 1-2-4-5-3.

Reys · Post by **Reys** » 28 Nov 2018, 19:20

If you removed the airbox to install the distributor cap , check all sensors and make sure you plugged them back in. Maf/ crank/ cam/ TPS .

NYCKID221 · Post by **NYCKID221** » 29 Nov 2018, 08:29

seems like the coil. how much gas is in the car?

rarkep · Post by **rarkep** » 29 Nov 2018, 10:45

WhatAmIDoing wrote: ↑27 Nov 2018, 10:36 Pull all the plugs and ground them to the top of the engine. Forgot to mention, you might want to pull the fuel pump relay so you aren't spraying petrol. Have someone crank the engine while you watch the sparkplugs. Look for a strong spark, consistency, and make sure the firing order is correct 1-2-4-5-3.

Great. Thanks!

rarkep · Post by **rarkep** » 29 Nov 2018, 10:45

Reys wrote: ↑28 Nov 2018, 19:20 If you removed the airbox to install the distributor cap , check all sensors and make sure you plugged them back in. Maf/ crank/ cam/ TPS .

Will double check but I’m pretty sure I got them all. Thanks!

rarkep · Post by **rarkep** » 29 Nov 2018, 10:47

NYCKID221 wrote: ↑29 Nov 2018, 08:29 seems like the coil. how much gas is in the car?

Half tank of gas. Going to try fuel pump relay jump and if that doesn’t work then coil.
Thanks!

Reys · Post by **Reys** » 29 Nov 2018, 17:28

If the car ran before the ingition system was touched then it should be more likely related to ignition than fuel. You should hear the pump prime when key is in position 2. You can also check for fuel by using a screwdriver and pressing the schrader valve at the end of fuel rail while key is in pos 2.
If that all checks out there is no need to jump the relay. Move on to ignition, sensors and anything else that was touched while you did the work

WhatAmIDoing · Post by **WhatAmIDoing** » 29 Nov 2018, 23:41

In my experience, always check the fuel pump relay, as it may very well save you a lot of headache. They often fail suddenly without warning, and aftermarket relays have caused weird behavior.

1998 Volvo V70 will not start after plugs, cap, rotor Topic is solved

Re: 1998 Volvo V70 will not start after plugs, cap, rotor